The movie "True Romance" 1993

On his birthday, Clarence (Christian Slater) meets a girl (Patricia Arquette), and they fall in love. But when they begin sharing their secrets, he learns that their meeting was no accident: she is a prostitute paid by his boss. To prove that her past does not matter to him, Clarence marries her and decides to settle things with her pimp. Clarence kills him and flees with a suitcase he believes contains his new wife's clothes. When he opens it, however, he gets a shock: it contains drugs, and the Mafia is on their trail to recover its merchandise...