Takato, Henry, and Terriermon have been cought underwater. They tried swiming out, and even diging out, but nothing worked, they only found water, water, and more water. When they came across a small group of rookie level Otamamon, they thought they wouldn't hurt them. Well, they where half right. Ultimate Level Divermon atttacked, but lost. After the fight, he explained that he thought they where hurting the Otamamon. They asked for a way out, he led them to a giant tube. Digimon have gone in, but none have come out. They tried the tube, they found out they could breath underwater. They found themselves at a library. In there, they saw Makumon. They went to a back room to find Shibumi. He explains that the upper plain above the rest of the digital world is where the ancient gaurdians live. But, the Saubren also lurks there. He explains that their digivices are actually called ""Arks"" and they are used for storing data. They notice a giant ark floating above them. They g