Lina and Gourry journey to a coastal town called Acassi, where octopus tentacle is considered a delicacy. However, the octopus flesh carries a curse that condemns the consumer to speak only Takogo (octopus language). Amelia, Zelgadiss, and Xelloss all arrive, and the main quartet (Lina, Gourry, Amelia, and Zelgadiss) becomes cursed. The octopuses summon the power of a mazoku to eliminate the humans once and for all. The white sorceress Ruma must learn the cure for the curse from her long-lost master in order to save the town.