Toto Esposito is a young lover who tries to abduct his beloved to marry her. However, Toto is wrong, and kidnaps an ugly woman named Carmela, who loves him, and chases him when Toto escapes. In a last attempt to escape by train from Carmela, Totò meets his friend Amilcare and a beautiful American journalist named Lana Ross, which offers the two a deal. Toto and Amilcare have to pretend detectives, who are investigating the death of many girls at the hands of a serial killer nicknamed "Bluebeard". Toto has to be the main dish of deception, because he has to pretend to be the boyfriend of Lana, who in the meantime is trying to fool the murderous Bluebeard, pretending to be in love with him.