Fenna and Duikang, two gifted teenagers on a mystical island, prepare to enter the prestigious Duel Academy, where card-based battles hinge on harnessing the powers of ancient gods. As Fenna’s natural talent outshines Duikang’s struggles, the siblings’ bond is tested, forcing them to confront formidable rivals and their limitations in a world where faith, family, and fierce competition collide. Little to their knowledge, a more profound evil is erected from the children's card game that would put the island and the world in extreme danger.