Description:

A few kids at pioneer camp sneak away to go on an underwater adventure.

The animation tells about several children from a Soviet pioneer camp on the Black Sea coast, where children come for their summer holidays. The children attend a lecture about the secrets of the underwater world. While the rest of their squad goes on to collect scrap metal, they sneak off to search for sunken treasure. They never do see a pirate ship, but their adventures prove to be even more fascinating. In the end, everything is donated to help the boy Mwamba and other children from his poor country.

This cartoon became the topic of discussion online in March-April 2022 because of the scenes after the 9-minute mark, as certain key words in it were familiar to people following contemporary war news about the sinking of the Russian "Moskva" flagship ("Z", "Neptune", "Fascists", "torpedo"). Z 29 is an authentic designation for a Nazi submarine, in this case: Type 1936A, Narvik class Destroyer.