In the school of the rainbow fish, the fish Humbrecht causes quite a stir. He claims that there is a plug at the bottom of the sea that prevents the water from draining. However, there is a nasty character who wants to pull the plug. If that happens, all the fish would be left high and dry. Lies like these can create fear and lead to conflict. The rainbow fish confronts Humbrecht and explains his idea: the talent for telling colorful stories can be used in a completely different way! With the help of the rainbow fish, Humbrecht becomes the friendliest fish in the school, entertaining everyone with his imaginative tales.

Marcus Pfister created one of the world's most beloved picture book characters with the rainbow fish. In his new book, he vividly combines an exciting story with a wise message. Untrue stories can certainly stir things up. But honest engagement with imaginative tales can be immensely entertaining.