In the mystical realm of the Himalayas, a young Yeti named Marilla embarks on a perilous journey. After losing the gemstone that connects him to his kin, Marilla finds himself alone and adrift. He forms an unlikely bond with a group of children in the woods, but their tranquility is short-lived.

When two rural twins vanish, Marilla discovers a cryptic clue linked to his gemstone. Undaunted, he ventures into the treacherous 'Cave of Wonders', a realm ruled by the malevolent witch Tamira. As Marilla navigates this dark world, he ignites a struggle between good and evil forces. Will he reclaim his gemstone and reunite with his family, or will the shadows consume him?