Homer and his companions went to the sea and met Pinot, the dolphin, by the shore. At Pinot's request, Homer and Mamming tried to defeat the demon in the sea. On the other side, Kautai, after learning about his identity, was plunged into confusion. Are mammals saving the world, or leading it towards destruction?

荷马一行人前往大海，并在海边遇到了海豚皮诺。在皮诺的拜托之下，荷马和马明试图击败大海中的恶魔。另一边，卡尤泰知道了自己的身份后，思绪陷入了混乱之中。究竟哺乳类是在拯救世界，或是引领世界走向灭亡之路？