Monster Strike the Movie: Sora no Kanata

Thirteen years ago, a huge section of Tokyo tore away from the ground and rose into the sky, creating two isolated cities: Old Tokyo above and New Tokyo below. With contact between them lost, the separation becomes a fact of life until a girl named Sora descends from the floating city and encounters Kanata, a young man living on the surface.

Sora knows that Old Tokyo is heading toward a catastrophic fall. As monsters and armed factions close in, Kanata discovers that he is connected to the crisis in ways he never imagined. Together, they race to uncover the truth and prevent two Tokyos from colliding in a disaster that could destroy both.