While Nobita is sleeping, he suddenly feels the floor is trembling, like there would be an earthquake in his room. A little rabbit from an alternate universe named Chamii opens the door between the dimensions using a hammer and gets inside Nobita's room through the floor. Nobita wakes up and Doraemon hears somebody steal food from the fridge in the kitchen. It is Chamii, who gets caught by Doraemon and Nobita. She shows them the passageway through Nobita's floor into the spaceship. After they enter the spaceship, they see Koya Koya Planet. They meet a boy named Roppuru.
In a gritty and alternate 1985 the glory days of costumed vigilantes have been brought to a close by a government crackdown, but after one of the masked veterans is brutally murdered an investigation into the killer is initiated.
From the Egyptian desert to deep below the polar ice caps, the elite G.I. JOE team uses the latest in next-generation spy and military equipment to fight the corrupt arms dealer Destro and the growing threat of the mysterious Cobra organization to prevent them from plunging the world into chaos.
This psychedelic tour of life after death is seen entirely from the point of view of Oscar (Nathaniel Brown), a young American drug dealer and addict living in Tokyo with his prostitute sister, Linda (Paz de la Huerta).