Sabrina Spellman (Melissa Joan Hart) and her friend Gwen (Tara Charendoff Strong) go on vacation to Sydney, Australia. They soon meet a merman, and Sabrina casts a spell to give him legs for two days. But as the two witches try to investigate the pollution that's making the mermen sick, suspicion is aroused. Salem the cat, meanwhile, sneaks into the hotel and falls for another talking cat.

Based on the TV series "Sabrina the Teenage Witch," this film originally aired on "The Wonderful World of Disney," and is a follow-up to the previous year's "Sabrina Goes to Rome" (where Gwen was introduced). Salem the cat (voiced by Nick Bakay) aside, none of the other cast members from the series participated in this film.