Pia's life, a girl from a small German town, changes when surprisingly, finds in her garden a huge black monster. She soon discovers that the mysterious creature, which called Yoko, is actually a kind yeti spiritually protecting animals and children worldwide. Yoko is constantly showing his friends Pia and their unique qualities, but children are not the only ones who want the Yeti. Its great value calls attention to two hunters who want to take advantage of the yeti.