The main characters, Mina and Tim, are two children who run aground on a magical island and have to find their missing shadows to return home. The scenario is an original story inspired by the Lost boys from Peter Pan. The twins Mina and Tim are led by a mysterious chant into Oniri, a magic river that connects universes. Stranded on an island, they soon realize that their shadows are gone, preventing them from leaving that strange place. They meet two animals, a Shark and a Falcon, who give them each one a mask before going back to the river. Thanks to the masks, Mina and Tim are granted each one an animal shadow and magical powers.