Tai and Agumon return to the DigiWorld, where they look for their
friends. They find Tokomon, who tells them that the other kids
split up to look for them.
He and T.K. met up with a new Digimon, Demidevimon, who seemed to be
a friend but caused the two to have an angry fight and go their separate
Tai, Agumon and Tokomon find T.K. and Demidevimon, and Tai tries to
get T.K. and Tokomon to make up. Demidevimon senses he's losing
his influence over T.K. and tries to get the others to eat some
mushrooms of forgetfulness, but they're warned off by a mysterious
female voice (Sora).
Realizing that Demidevimon isn't a true friend, Tokomon digivolves
to Patamon and drives him off.