After Kari collapses in the heat from sickness, Tai searches desperately for medicine to help her. Kabuterimon flies them to a nearby city, and Izzy uses his laptop to locate a pharmacy where they could find medicine. This proves a drastic mistake, however, as Machinedramon is given their location every time they plug the laptop in. Machinedramon sends Digimon out to all the locations in which the pharmacies were found. Meanwhile, after finding a pharmacy, Izzy plugs in his computer yet again to find the best specific medicine for Kari, still unknowingly, giving Machinedramon his exact location. They find the medicine, then they are ambushed. Izzy and Tai manage to escape, but Tai loses control in impatience and screams at Izzy. He feels responsible for his sister, and he reminisces of another time his sister was sick.
Tai was much younger, as was Kari. All he wanted to do was play soccer, despite being told to watch his sister at home because she was ill. Overcome by selfish desire, but not wanting to leave his little sister alone, he brings her along to the park where he wants to kick a soccer ball around with her. He begins to get frustrated that she can't kick it well, and tries to teach her. Not long after, she collapses, and an ambulance comes. Tai is harshly scolded by his parents because she nearly died of pneumonia. When Kari comes home, she apologizes to Tai for not being able to kick the ball right, helping Tai to make his point of, "she only cares about everyone else." After Tai calms down, they at last figure out they were being tracked by the computer systems.
Izzy quickly adjusts the program so they cannot find them. Soon after Tai and Izzy meeting back up with Sora, T.K., Kari, and unfortunately, Machinedramon. Machinedramon then attacks the group and they fall into a deep black hole, the innards of the destroyed building.