With his resolve restored, Takuya returns to the Digital World as Agunimon. Along the way to rescue his friends, who are being held by Ranamon and Mercurymon, he grows in tune with the Digital World and his Spirits.
Takuya, in the form of Agunimon, returns to the battle site where his plan failed but is unable to find anyone. He begins to search for his friends, fearing the worst. He soon finds Bokomon and Neemon being tormented by a Sepikmon, who only wants to be friends. Sepikmon uses his Spirit Boomerang to lead them to Mercurymon, who is holding the others captive.
J.P., Zoe, and Tommy are being held by Mercurymon and Ranamon at the Old Castle while several Datamon attempt to release the Spirits in their D-Tectors. Ranamon becomes impatient and decides to force the location of Takuya and Koji out of the three by tickling Tommy and Zoe. When that fails, she uses an attack to torture J.P. Koji, who manages to track down his friends, spirit evolves to Lobomon to intervene, but he is still injured from his battle with Duskmon and finds himself overpowered, especially when Ranamon joins the fight as Calmaramon. Agunimon finally manages to find his friends but realizes how dire the situation is and that he needs to proceed cautiously. Now both at peace with himself and in tune with the Digital World, he and Lobomon manage to return the D-Tectors to J.P., Zoe, and Tommy, all of them drive off Ranamon and Mercurymon. Afterwards, everyone knows how much Takuya has grown up, but unknown to them, Mercurymon has a plan to defeat them.
(Numbers indicate order of appearance. Bolded characters are fought by the protagonists, and italicized characters appear only as a voice or silhouette.)