Double Murder (1977)

"Double Murder" is a 1977 Drama movie directed by Steno and starring by Marcello Mastroianni, Agostina Belli. Detective Baldassarre spends his forced exile sorting criminal records. He gets a chance to return to the line of fire when two people, an aristocrat and a worker are struck by lightning inside a fancy mansion. The incident would be relegated to freak accidents, but Baldassare's attention is drawn to the strangeness of the events and he begins to investigate.