Legends recount the tale of Sacred Guardians known as Shalen, who attempted to defend the lands against four beasts from another world by wielding the powers of fire, metal, water, wood, and earth. However, the beasts proved too powerful for them until a new power was discovered - the wind spell. The spirits of the beasts were sealed, and peace was restored to the human world. Since then, individuals born with a special mark on their hand become Shalen, tasked with protecting everyone in the human world. Lang Ming is a young blind boy with exceptional hearing. While living with his mother in Xiaoyanggang and trying to earn money, his town is attacked by a demon and his mother disappears. Lang is prepared to do anything to find her, so he strikes a deal with a strange girl, whom he later calls Little Goblin. This marks the beginning of an epic adventure that will change Lang Ming's life forever.