Summary Aliki and Kostas meet one summer on the island of Poros, where they have gone on a trip, each one with their friends. The one is charmed by the other and agree to meet again, but the date they arrange doesn’t take place. They meet again by chance at the annual ball of the School of Naval Cadets, since Kostas is a cadet Sub-Lieutenant, while Aliki is the daughter of the Admiral and Commander of the school. This time, however, they are determined not to stupidly lose each other again and disguise Aliki as a sailor so that she can go aboard the ship on which Kostas is serving. Then, the ship (the destroyer Aetos (Eagle)) takes part in a major drill, and the presence of the pretty girl on it causes a number of unexpected and amusing incidents.