Doctor's daughter Leila is getting married to engineer Lauri. Before the wedding, Lauri's ex-girlfriend Asta and poet Esko, who is in love with Leila, mess up the relationship between the happy couple.
Customs officer Tapio goes undercover to reveal a smuggling ring, which operates within an entrainment troupe. While doing his detective work, he also gets to know the beautiful dancer Leila.
Dentist Lauri Liesi is performing as a magician in the Hotel Metropol. Meanwhile, during his performance top-secret letters of engineer Arpila are stolen from his room. Mr. Liesi is then being accused of the theft. To clear his name he starts to investigate and search the culprits from the criminal underworld. With the help of a former circus man Romonen he begins to unveil the truth.
