Rei goes to an isolated island to practice her skills, but soon the other girls decide to join her. While on the island, ChibiUsa makes friends with a baby dinosaur when he rescues her from a shark attack. When the mother arrives and tries to drag the baby away, ChibiUsa is hurt at the loss of her new friend. Then she realizes why the dinosaurs want to leave; the island's volcano is about to blow! There is a cave-in that traps ChibiUsa's new friend. The Sailor Warriors finally find ChibiUsa and use their powers to stall the lava and rescue the dinosaurs.
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