Im Untergrund suchen Mikey und dessen Team nach den gefangenen Digimon und Cutemons Eltern. Die Daten der Digimon wurden bereits extrahiert, um so das ultimative Digimon der Zerstörung zu erschaffen: Breakdramon. Ein Sieg gegen Breakdramon scheint aussichtslos, denn er kämpft mit unfairen Mitteln und benutzt Cutemons Eltern als Schutzschild, was einen Angriff unmöglich macht.
Xros Heart find themselves into the Sweets Zone's underground and with the impression that Cutemon's parents are among them, Taiki and others attempt to search for and save everyone only to find themselves surrounded by Raremon. They managed to escape with Nene's Monitamon attack, causing the team to separated into three groups with Zenjirō and Nene learning the Raremon are the prisoners transformed. Furthermore, Cutemon's parents are nowhere to be found as the nearly complete Breakdramon emerges. Shoutmon ×5 is then formed to fight the robotic dragon before Matadormon appears with Cutemon's parents as hostages, forcing Xros Heart to step down with Shoutmon ×5 being attacked nearly to death. However, through his parents' telepathic request, Cutemon heals Shoutmon ×5 as he proceeds to destroy both Breakdramon and Matadormon, with Cutemon's parent being rescued. With the Raremon restored back to their original forms, Cutemon says goodbye to his parents as he continues with Xros Heart to the next Zone.
Tras el ataque de Matadormon, todos caen a una zona subterranea.Cutemon cura a Zenjirou que terminó lastimado, en este momento detecta que sus padres están cerca. Cutemon va por ellos pero se encuentra con muchos Raremon. Dorulumon lo rescata a tiempo. Taiki quiere escapar del lugar sin luchar así que los Monitormon ayudan lanzando una bomba de humo.Nene y Zenjirou se encuentran con muchos Raremon. Nene no tiene más opción así que Zenjirou la salva escapando por otro lugar.
מייקי ונבחרת ההתאחדות נופלים אל תוך תהום דיגיטלית באיזור המתוק ומגלים שם את כל הדיג'ימונים האבודים והנתונים שלהם, ביניהם גם ההורים של קיוטמון! קיוטמון נחוש להציל את ההורים, כשהוא לומד על הדרך שיעור חשוב בחברות.
