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.
Joel Rinne
as Lauri Liesi
Hilkka Helinä
as Raija Arpia
Ritva Arvelo
as Kirsti Salme
Eine Laine
as Mrs. Luokki
Rauha Rentola
as Milla
Reino Valkama
as Perttu Romonen
Tauno Majuri
as Reino Arpia
Paavo Jännes
as Niklas Rami
Kaarlo Aavajoki
as Romsu
Matti Aulos
as Anders Luokki
Kaarlo Halttunen
as Doctor (uncredited)
Paavo Honkamäki
as Mattinen (uncredited)
