October 28, 1940. Along with the Italian army's attack on the Greek-Albanian border, Greece comes under fire from the Italian air force. The submarine Papanikolis, commanded by Captain Milto Iatridis and First Officer Vasilis Aslanoglou, is ordered to patrol the Gulf of Patras. Following the army's victories, the war council decides that it is time for the navy to enter the war and orders the submarine Papanikolis to patrol the Strait of Otranto. There, the crew captures the crew of an Italian ship and their engineer reveals the minefields of the Adriatic. Thus, the Papanikolis begins its mission. After completing its mission, it returns to its base, where it is honored.
Κώστας Καζάκος
as Miltos Iatridis
Γιάννης Φέρτης
as Vasilis Aslanoglou
Αιμιλία Υψηλάντη
as σύζυγος Ιατρίδη
Παύλος Λιάρος
as Ανθυποπλοίαρχος Μπότσαρης
Σταύρος Ξενίδης
as Υφυπουργός
Άννα Βαγενά
as Αρραβωνιαστικιά Μπότσαρη
Αρτέμης Μάτσας
as Ιταλός μηχανικός (αιχμάλωτος)
Βασίλης Μαλούχος
as Κατσικογιάννης
Ντάνος Λυγίζος
as Εκφωνητής ραδιοφώνου
Γιώργος Κυριακίδης
as Κυβερνήτης Νηρέα
Νίκος Λυκομήτρος
as Ναύτης
Νίκος Βασταρδής
as Αξιωματικός Ναυτικού στη σύσκεψη
