Lisa lives with her mother in a small town far from Moscow and works at a school as a teacher of Russian language and literature. A few years ago, a girl got into a car accident and lost her memory. One day, images of a parallel reality begin to appear in Lisa's mind, in which she has a completely different life: a husband, a young son, and a risky journalistic investigation. Wanting to understand what is happening, the girl shares her doubts with Oleg, the new geography teacher. Together they decide to uncover the mystery of Lisa's past.