Il "rospo"

An actor who has just been fired from the set of the TV series in which he starred is killed in his home. In the house, some threatening letters are found, signed "Toad" (in English "Toad") and addressed to the unpleasant character he played. It seems clear that a madman mistook fiction for reality and took action. But is it really like that? Meanwhile, the female protagonist of the same sitcom also receives a letter from the Toad...