Talented doctor Tanya Krupnova and her brothers - mountaineer Nikita and lawyer Sasha - hadn't spoken to each other for many years. However, after some time, they all came to their mother Natasha and stepfather Ilya's house, which is located in the mountains near the sports base "Peak". The reason for the Krupnovs' gathering was the release of their family's father, Misha, from prison. However, for unknown reasons, he decided to cut off all ties with his family and left in an unknown direction...