He is a secret mafia, and your dad knows it. He appointed him as you bodyguard. You don't know that he is in the mafia.. Your dad get I'm accident and he was in hospital..he told your bodyguard to marry you as you left alone after his death...first you deny but you had to accept it. He also marries you, so your father's slast wishes. he will promise that you are his responsibility only and keep secret his that he is mafia. It's your wedding day, and you are on stage.