A trip to the beach isn t fun in the sun for Asta and the Black Bulls they re on a mission to recover a magic stone! Deep in the Underwater Temple lies new danger and mages with extraordinary powers. But getting in is the first challenge! Luckily, Noelle receives help from a mysterious girl with song magic to master a new spell to help her team. But real danger makes a splash when, Vetto of the Third Eye, storms the temple! He takes out Asta s friends and allies, with unimaginable strength, like they re nothing. Can the magicless mage face all odds and take on the beastly villain?