While aboard a cruise ship for the evening, Yuriko finds a child's doll, which suddenly speaks to her. The voice introduces itself as Zemi, an alien from the Planet Ruparts, and warns of an invasion from outer space. Shocked, Yuriko throws the doll overboard, but Jun and Ippei take little heed to her story.

A ring of smugglers, including a mysterious woman named Aleen, steal a rare statue and kidnap a young girl named Tami in the process.