The story revolves around a young determined woman named Svetlana. She lives in Moscow, has a successful career, and is happily married. However, she has a secret: in her youth, Svetlana abandoned her son as a baby. He was born with a heart defect, and doctors unanimously declared that his days were numbered. For many years, Svetlana has been tormented by guilt. Upon discovering that her husband has a mistress, Svetlana decides to leave Moscow and find out what happened to her child.