An orphaned cat adrift at sea is raised by an otter to live in the ocean. They live together in peace until one day they encounter a submarine.
| Actor | Role |
|---|---|
 Yoshiko AsaiNarrator (voice) | Narrator (voice) |
 Tessyo GendaDolphin (voice) | Dolphin (voice) |
 Hajime KosekiSeal (voice) | Seal (voice) |
 Kiyonobu SuzukiWalrus (voice) | Walrus (voice) |
 Yumi TakadaGirl (voice) | Girl (voice) |
 Hitoshi TakagiWhale (voice) | Whale (voice) |
 TARAKOKitten (voice) | Kitten (voice) |
 Rihoko YoshidaMother Sea Otter (voice) | Mother Sea Otter (voice) |