Legend has it that the Shalen, revered Sacred Guardians, used fire, metal, water, wood, and earth to protect their land from four formidable beasts from a foreign world. Despite their efforts, the beasts proved too overwhelming until they stumbled upon the wind spell, enabling them to capture the creatures and restore peace to humanity. Those with the unique mark on their hand are selected as Shalen, responsible for safeguarding people. Lang Ming lives in Xiaoyanggang with his mother, but he is blind yet has remarkable hearing. When a demon wrecks his town, Lang is desperate to find his missing mother and forges an agreement with a strange girl called Little Goblin. Their partnership leads them on a remarkable adventure that alters Lang Ming's life irrevocably.