In this universe, there's a world made from two twinned planets that come with "dual gravity",
allowing them to orbit each other extremely close without issues. There are three natural rules that
keep everything in order: all matters are pulled only by the gravity of their planet of origin,
an object's weight can be offset using matter from the opposite world which receives the name
of "inverse matter", and matter in contact with inverse matter starts burning after a few hours
of contact. These two planets are so close to each other that they have become each other's sky
views, they also keep the two classes separated: the upper world is rich and sophisticated, full
of technological advances for the upper class to enjoy; while the lower world is dark and poor. The
upper world exploits the lower world's resources for its own benefit, and they own the only company
that has a building connecting both planets, called TransWorld. In this company, people from
different worlds are allowed to interact for the sake of work, and it comes with its own facility
for the rich people to enjoy alternate gravity for the sake of curiosity. Outside this building
people from different planets aren't allowed to interact, and the law will punish them if they
do so. It's in an orphanage in the lower world where young Adam lives after he lost his parents
to a TransWorld factory explosion that destroyed half the city. His only living relative is his
great-aunt Becky, who Adam visits on the weekends, getting to enjoy her flying pancakes. The secret
behind these pancakes is in a book that Adam will inherit someday: it turns out Becky uses pollen
from pink bees, who pollinate flowers from both worlds and live in the sage mountain. One day,
Becky sends Adam to that mountain to collect pollen, and he gets to climb to the highest point,
allowing him to touch the upside-down rain from the other world. When Adam throws a toy plane up,
it falls on the upper world and is caught by a cute girl that instantly becomes his friend.
From that day on, the two of them keep on meeting there, and once they become teenagers, Adam and
Eden start a romantic relationship. Adam always uses some rope to bring Eden over to his world,
that way they can kiss, hug, and share food from each other's home. One afternoon, while Adam is
taking Eden for a run through the woods, they are found by a group of guards that open fire on them.
Adam rushes back to the mountaintop and tries to send Eden back to her world using the rope as
carefully as possible but when one of the bullets hits Adam's arm, the rope slips from his hands
and Eden falls on the ground, hitting her head. After crying his grief out, Adam returns home,
where he has to watch how Becky is arrested and her house is burned down. Ten years later,
Adam works in a mechanics shop with fellow orphan Pablo under the mentorship of their boss Albert.
When he has free time in the shop, he works on developing an anti-gravity formula for facelifts
by using pink bee pollen. Unfortunately so far it only works for a few seconds because
the equipment he needs to advance can only be found in the upper world. One afternoon,
Adam is watching television when she discovers Eden is still alive and working for TransWorld,
so he decides to get a job there as well to get a chance to meet her. By showing them his
experiments with anti-gravity matter, he quickly gets the position, but Adam is also reminded he
shouldn't interact with people from the upper world for anything that is not job-related,
and that if he steals any of the inverse matter he'll be given for his research, he will get
in serious trouble. When Albert learns about this turn of events, he is furious with Adam,
considering him a traitor for teaming up with the company that has destroyed their city. After
reminding him that TransWorld took his entire family, Adam reminds Albert that he isn't a fan
of TransWorld either, but it's his only chance to have a decent life. Then the two reconcile with
a hug. Meanwhile Eden is going to a support group to help her deal with her amnesia, which she's had
since she fell that day on the mountain. On his first day of work, Adam is giving his first batch
of inverse matter and access to a refrigerator to keep it safe. He also gets to befriend Bob, an
employee from the upper world that invites him to meet him in the smoking room because nobody will
see them there. Bob is a collector of stamps and asks Adam to get them some from the lower world,
Adam accepts if in return Bob finds a way for him to get in contact with Eden. As days pass,
Adam works hard on his anti-gravity formula while discretely stealing a bit of inverse matter every
day, which he hides inside a suitcase in the maintenance room. He also starts growing special
flowers under his desk. Bob is incredibly happy when Adam brings him the stamps, and not only he
gives him Eden's office number, he also brings Adam some nice clothes he can wear for when he
finally gets that date. The experimentation with the cream goes well when Adam tests it with a dog,
getting him approval to start testing with humans too. After that successful afternoon,
Adam pretends to stay behind in the office to work extra hours, and once everybody is gone, he uses
Bob's phone and name to arrange a meeting with Eden, saying it is for work reasons. Later in the
evening, Adam gets Pablo and Albert to help him make a special suit to hide the inverse matter in,
that way he can see Eden while pretending to be from the upper world. Pablo wonders what exactly
Adam's plan is here because even if Eden takes him back, the law will never let them be together,
but Adam dismisses his worries. The next day, Adam changes in the maintenance room,
and his body changes gravity as soon as he puts on the inverse matter on his clothes. He has to leave
in a hurry because a guard hears him around and comes to investigate, but he manages to take the
elevator before he gets caught. Sadly seeing Eden again isn't as exciting as he hoped because there
is a huge problem: she doesn't remember him. After hearing from the secretary that Eden has amnesia,
Adam sticks to work-related conversation while occasionally dropping hints about their childhood
together to see if it triggers something in her, to no avail. Eventually the inverse matter in
Adam's clothes begins burning him, so he rushes out of the room claiming to need to relieve
himself. In the bathroom, he wets the inverse matter to cool it down a bit and before going
back, he decides to pee, but since he is from the lower world, his urine floats up and hits the
ceiling, activating the alarm. Now Adam has to run back to the lower world to avoid being discovered,
leaving Eden waiting for him for nothing. The following day, the company's CEO announces which
employees will be fired next, which seems to be a regular occurrence in TransWorld. The list of
employees includes poor Bob, who is told it is time for him to retire after thirty-one years of
service. At the end of the day, Bob says goodbye to Adam and gives him a box pretending it's extra
tools for his experiments, but he actually includes his ID so that Adam can leave the
building through the upper world door. After Bob is gone, Adam uses his phone again to contact
Eden and ask her out on a date. Using the inverse matter suit and Bob's ID, Adam gets to visit the
upper world for the first time and is amazed by the way technology can be found in every corner.
He meets with Eden at a restaurant and can't help asking her how come she doesn't remember him,
but Eden gets so upset about her lack of past memories that Adam changes the story to mean
randomly seeing each other in the elevator. The two of them have a lovely meal together,
and when Adam's shoes start burning, he ends the date, promising Eden to see her again soon
before running to the nearest river and jumping into the water. Then he drops all his weights
and lets them sink, that way he returns to his own world naturally by letting gravity take him
back into the opposite river. That night, Eden dreams of blurry mountaintop meetings and Adam's
voice. Sometime later, Adam makes a presentation at the company to show how the cream is finally
working on human faces as intended. Eden shows up to ask if he's really Bob, and since their
bosses are there, Adam can't lie and tells her his real name. Eden leaves in tears thinking he
must've been trying to scam her, so Adam drops the presentation in the middle of it and goes looking
for her after changing into the new inverse matter suit he's made. Eden's secretary tells him she's
left the building and Adam does the same using Bob's ID again, but this time the system is up
to date and recognizes the card as terminated, which means guards start chasing Adam too. Adam
runs through the city and realizes he only has one way to lose the guard: he takes off his weights
and lets gravity take him up to hide underneath a building balcony. That night, Eden dreams again,
and this time she remembers her entire first meeting with Adam when they were kids. In the
morning, Adam goes to Bob's house, who doesn't hesitate to hide him for a while and fixes his
suit to make it stop overheating anymore. As thanks, Adam shows Bob his anti-gravity formula,
explaining he didn't tell TransWorld the final ingredient so they can't steal it from him. The
people at TransWorld are realizing this too, and the CEO orders his guards to find Adam before the
cops do. A few moments later, Adam visits the same restaurant and is pleased to find Eden waiting for
him because she finally remembers it all. The couple reunites with a kiss but unfortunately
their sweet moment is interrupted by the police coming after Adam, forcing him to escape through
the window and lose his weights again to let gravity take him back to his own planet. While
reporters on tv cover the story of a fugitive from the lower world, Adam returns to the mountaintop,
which is the perfect step to take because Eden does the same on her side. The couple reunites
once again when Adam jumps over with his inverse matter suit and they get frisky while they float
around thanks to their combined gravities. Shortly afterward, the guards find the couple and begin
chasing them through the woods, thus Adam decides to take off the inverse matter weights and grab
Eden to take her with him as his planet's gravity does its thing. They end up stuck inside the old
abandoned structure of a zeppelin and when Adam is accidentally hit by a bullet, he urges Eden to let
go of him so she can save herself. Eden ends up being arrested, and Adam miraculously survives by
landing on top of a tree. As Adam makes his way back home, he's approached by two agents sent
by TransWorld that leave him an ultimatum: if he gives them the complete anti-gravity formula and
promises not to contact Eden again, then they will drop all the charges. While Adam starts to come
to terms with the fact he has lost and he'll be a loser in the lower world forever, Bob continues to
experiment with the anti-gravity demo Adam left behind and manages to take it one step further
by combining it with water. In the meantime, Eden receives the special flowers Adam had been
growing, inspiring her to go to Bob for help. The next day, Adam is working with Albert again
when he's suddenly visited by Bob, who has managed to come to the lower planet by using the updated
anti-gravity formula on himself, since the body is mostly made out of water. He's also sacrificed his
stamps to make some money and bought the patent under Albert's shop's name before TransWorld did,
so their future is secure. Lastly, Bob tells Adam he has a date waiting for him. After changing into
nicer clothes, Adam rushes to reunite with Eden, who is in the lower world thanks to Bob and the
updated formula, meaning she now can stay here permanently. She's also brought big news: she's
pregnant with twins. The couple is happy to start a family together, and thanks to Albert's business
picking up through the formula and the birth of the first kids that can live in both worlds,
society slowly begins changing until both worlds become equal in class and technological advances.