Elena continues to help Marcello, even though he is no longer her patient, so that he can discover the truth. It is about digging into the past and Marcello manages to fish out memories that, however, are too painful. Marcello is not the only one in difficulty, Elena also finds herself having to manage a difficult situation, the doctor has problems with her daughters that she does not know how to solve.

Elena has now discovered the identity of patient 13 but it is premature to reveal it to him. Thanks to the conversations with the people who populated the man's life before his hospitalization, Elena learns his private and professional details, but also a terrible trauma.

Neuropsychiatrist Elena Astolfi, a mother of two girls, loses her husband Lorenzo in a bad accident. A year later, the woman returns to work; among her new patients is Patient 13, a man with no memory that no one can identify.