Makoto is an ordinary teenager who spends most of her time with her friends. One day, while rushing to visit her aunt, she narrowly avoids being hit by a train—she jumps back in time to the moment before the accident. Using her newfound abilities, she fixes her everyday mistakes—from poor test grades to failed declarations of love. But when the consequences of manipulating time catch up with her, Makoto must do everything to avoid a terrifying, irreversible future.