Believing in humanity and order, policewoman Akane Tsunemori obeys the ruling, computerized, precognitive Sibyl System. But when she faces a criminal mastermind who can elude this perfect system, she questions both Sibyl and herself.
Four young friends' paper routes are disrupted on Hell Day 1988, when they unknowingly time travel to 2019. While searching for a way home, they come face-to-face with their adult selves and learn how to work together to save the world.