Lieutenant Ville Somero investigates a sabotage at a fortress site on the Karelian Isthmus in the summer of 1939. His suspicions are directed at the guests of a nearby guesthouse. Aarno Teräs an engineer leading the fortification site, and his bride Birgit Lahti get into trouble because of a band of spies and dancer Veronica Sorrento.

---

Main Cast: Matti Lehtelä, Dolly von Alfthan, Ensio Jouko, Aarno Kivistö, Anna-Liisa Sarvanto, Verna Piponius, Sven Relander, Aune Häme, Runar Schauman, Eero Leväluoma

Directors: Erkki Uotila, Theodor Luts

Writers: Eero Pursi, Aksella Luts

Editor: Eino Kari

Cinematographer: Eino Kari

---

Popular Double Features