The TV series "Broken Melody" is a detective story about children unraveling the secrets of their parents. At a fashionable presentation, the famous elderly model Anna Nikiforova unexpectedly dies. Her daughter Elena learns that on the day of her mother's death, she received an expensive gift from her former Italian lover Donato - a carnival mask with Borgia stones. Elena's father is suspected of the murder. However, at that time, Donato takes his own life, confessing to the crime. However, neither Elena nor Donato's son Antonio believe that one of their fathers could have killed Anna.