The boys, masterfully led by Captain Jack, don't yet realize that two pigtails are hidden under the commander's large cap, and that the beautiful name Jack has been appropriated by an ordinary girl who loves the sea and spends a lot of time on the decommissioned ship "Signal." The film tells the amazing story of the Signal crew, who saved the lives of prisoners of war, Gunar and Mitya, during the war. And when the old boat with the boys on board was in danger, Mitya unexpectedly appeared on the ship and, of course, helped his new friend, Captain Jack, moor the Signal to the shore.
