The adventures of the water sprites, creatures living in Lake Goplo, whose fur is coveted by Goplana. The beavers come to the rescue of the water sprites, and Goplana and her henchmen receive their just punishment.
| Release Date | January 1, 1988 | |
|---|---|---|
| Status | Released | |
| Original Title | Królewski płaszcz | |
| Runtime | — | |
| Budget | — | |
| Revenue | — | |
| Language | Polish | |
| Original Language | Polish | |
| Production Countries | Poland | |
| Production Companies | Studio Miniatur Filmowych | |