Kari and Gatomon

Summary
Taichi's group dive into the ocean on their way to FAGA, the location of Millenniumon's largest piece, in order to stop his resurrection, but they are knocked out of the marine current and take shelter on an underwater city led by MarinAngemon. After spending the night in the city, the children are about to resume their journey when the city is attacked by Anomalocarimon and a group of Mantaraymon. While the other Digimon of the group fight along their human partners, Tailmon insists on fighting alone to protect Hikari, until Hikari convinces her that they must fight together and Hikari gains her own Digivice, using it to power up Tailmon who leads the others to defeat the invaders. After the battle, the children bid farewell to the underwater city and continue their quest to stop Milleniumon's return.

In the meantime, all efforts to save the ISS from the collision with the satellites have failed, and the remaining crew evacuate in the Soyuz spacecraft, leaving the space station to its fate.