Eighteen-year-old Vasya Tikhonova arrives with her parents for treatment in a boarding house near Moscow. The girl has a congenital heart disease, so she is under the careful care of her mother. Simultaneously with the arrival of the Tikhonovs in the boarding house, a murder occurs. Exactly seven days life Vasya radically changed. She will meet her first love, take a terrible risk in the struggle for her and make a terrible discovery at the same time giving freedom.