A scientist desperately wanting to prove that mermaids exist is ostracized from the scientific community in Japan. He settles down in Australia steadfast on his hypothesis. When a Japanese student visits him in Australia with strange questions about mermaids, how the young man survived in the ocean, and why he doesn't remember anything.
Blair, Tootie, Natalie, Jo, Beverly Ann, and Andy visit the land down under. Blair and Jo are warned of a planned jewel heist; Beverly Ann visits a beau from many years ago; Natalie is stranded in the outback; and Tootie meets a Yale student who pretends to be a young Aborigine.