L'enigma delle due sorelle(1980)

L'enigma delle due sorelle is an Italian thriller series set in Rome. Nora Mariani, a successful advertising photographer, receives mysterious phone calls from a woman claiming to be her sister Claudia—who supposedly died in a car accident two years earlier in Germany. Nora was driving that night, and the crash left her traumatized and unable to drive since. As the calls grow more frequent and unsettling, Nora becomes convinced her sister is still alive. The series follows her descent into doubt and obsession as she grapples with the possibility that everything she believed about that fateful night might be wrong. Suspense mounts as Nora searches for the truth behind the calls and her sister's fate.