Alina, orphaned at a young age, discovers the murder of her sister Enrica, but the surprises aren't over because an Inspector reveals to her that her sister was a luxury call girl who got clients on the Internet. The hunt for the maniac begins.
A man, wearing a motorcycle helmet, stabs Eleonora, a wealthy heiress. Near the scene of the murder, a photographer—hired by her jealous husband to follow her—takes a picture of an architect. The police are quick to identify him as both her lover and the killer. But the truth is different...
