Porwanie plot
The old schooner Nadzieja is the pride of Captain Angelow, where a group of children on board will learn the taste of sailing. However, the Port Authority decides to demolish the ship and retire the captain. Captain Angelow then suffers a heart attack and ends up in the hospital. But his young friends want to save the schooner. The young sailor Jurek comes to their aid. Under his command, the children hijack the ship. The great adventure turns unexpectedly dangerous, because there is a criminal below deck. This one is looking for a valuable icon that is hidden there and stolen from the monastery. Adults rush to rescue the children, including Angelow, who escapes from the hospital after hearing about the ship's hijacking. The criminal is caught and the children name the renovated yacht after Captain Angelow.