Taichi Yagami and the rest of the DigiDestined return to the Digital World only to find their partner Digimon have lost all memory of their years together after a system reboot. Sora Takenouchi struggles to trust Piyomon again, while a distraught Meicoomon reappears and vanishes searching for her partner Meiko. When the rogue Digimon Machinedramon scatters the group across the Digital World, Taichi, Yamato Ishida, and the others must rebuild broken bonds with their partners before they can uncover what erased those memories. The fourth film in the Digimon Adventure tri. series.