The royal squire Jiřík tastes a bite of a magical snake and understands the language of animals. However, he is guilty of transgressing his king's orders and faces either the death penalty or a precarious and dangerous journey to find Goldilocks, a princess from a mysterious realm in the middle of the sea. He sets out on his journey accompanied by Štěpán, with whom he has grown up since childhood, and Štístko, the little dog whose life Jiřík saved. Jiřík will have many adventures and surprises along the way. He has no idea that Štěpán is filled with envy and is not the sincere friend he seemed to be. Fortunately, Jiřík has brave allies, the animals he has helped.