What happens if you write today's date on an ancient stone with mysterious writing? An innocent prank turns back time, and now Gleb and his friends will have to live their lives in reverse order. How now can they get back to the future?

A story about the fantastic adventures of modern teenagers, whose life, through the fault of one of them, begins to move in the opposite direction. They will not only have to relive the past days, but also experience events that will later change the lives of their loved ones and themselves. Only the act of the protagonist can turn off the mysterious mechanism that determines the course of time.