Despite being named after the movie of the same title, the game's plot bears little resemblance. The story is that Ursula, the Sea Witch is plotting to take over Atlantica and is transforming its populace into polyps. Not only that, but she has also managed to kidnap a member of the royal family, (either Triton or Ariel depending on who you play). It is up to Triton/Ariel to traverse many dangerous locations, defeat Ursula's minions, and free the ocean from her tyranny once and for all.