An alienated teenage girl lives unhappily with her indifferent father, uncaring stepmother and bratty half-sister. When she's finally reunited with her glamorous-yet-reckless biological mother, the two form a deep, inseparable bond.

The lives of a college student and a video game designer are kept being reset after an explosion on a bus. During each reset, they have to work together to find out what the reason for the explosion is. Will these two be able to save themselves and their fellow passengers? Will they be able to close the time-loop?