Water Ghost The passengers aboard a cruise ship are soaked in a strange water that causes them to expel data in the form of water. The group arrives at a nearby city to participate in a local festival, only for the inhabitants to suffer from the same phenomena. As the city floods, they run to higher ground and encounter Submarimon, who reveals that the water was created by a group of Divermon. He accompanies them to a nearby shrine, where they discover a mummified body that is actually a dehydrated Cthyllamon, the leader of the Divermon. Refusing to restore the villagers, Cthyllamon and the Divermon attack Hiro and Ruli and put them under their control, leaving Kiyoshiro to fight them alone. During the fight, Kiyoshiro's bond with Thetismon allows her to Digivolve into Amphimon for the first time. She defeats them and convinces them to restore the humans they attacked, which they agree to.