Seventeen-year-old Gretchen thinks her father and stepmother are fools. After her mother’s death, she moves in with them at a mountain resort – a place so dull, it feels like she might die of boredom. Then again, there are other ways to die. Gretchen's monotony is soon disturbed by a mysterious woman who attacks her at night. But that’s not the only strange thing – the passage of time in the mountain town seems off, not moving in a straight line but looping and repeating… How do you stop the one who controls time itself?