How can an ordinary train journey change someone’s life? Radically! In the business-class carriage, Valeria unexpectedly becomes an unwilling witness to a conversation between two men. One speaks with pain in his voice, telling about his wife’s infidelity, while the second suggests getting rid of the unfaithful woman in the most radical way possible. Valeria is shocked by what she hears and wants to warn the woman about the danger looming over her. But unexpectedly, the betrayed husband falls in love with her himself—and soon, under unclear circumstances, he dies. His wife is kidnapped by unknown people. Valeria turns out to be the heir to a huge fortune. And it’s right here that Kirill appears on the horizon—the second passenger. He claims to love her madly and behaves like a lover. Valeria decides to let him get closer in order to unravel the mystery that has tortured her: who stands behind these crimes? The number one suspect is Kirill!