Foreign spies steal the formula for a revolutionary explosive created by an Italian scientist and to decrypt the secret code they kidnap his secretary who knows about it.

Grace Peterson works in department stores "Tutto per Tutti", along with many other young people. His employment contract entitling them to live in a boarding house built specifically for them by the company but on the other hand, forbid them not fall in love or marry under threat of dismissal. Still, Grace falls for Phil Golder, a violinist penniless. The director of the residence will notice and the best friend of the girl impersonate violinist girlfriend to try to save Grace dismissal.

A country braggart bets that he can spend a night with a local beauty. When he is surprised by her husband, he is not only forced to pay his friends money but also challenged to come up with a new identity other than Casanova or Don Juan.

"Black Crossing" - In an Oriental port a group of people embarks a trader designated for Europe. One of them, a shady individual, entrusts the captain with a box of valuables to be kept until the end of the journey.