This children's adventure movie is a charming tale of a group of youngsters in Prague who hear that Soviet sailors abandoned their failing ship in the Arctic Sea before it went down, but no one had been able to find the sailors yet. Inspired by the efforts to save the men, the youngsters strike out on their own to help in the rescue attempt.

The tale of young Gritta who lives with her father, an unsuccessful inventor. When her new stepmother tries to put her away in a convent she discovers some dark secrets there.