5 Is the Perfect Number (movie, 2019)

Peppino, a retired hitman for the Camorra, has now fully passed on his job and know-how to his single son, Nino. But when Nino is brutally assassinated, the old man is back in business to take revenge. Aside his everlasting love Rita and his longtime henchman Totò, Peppino will go to any lengths, even if it means bringing the Camorra down.