My Sister's Keeper

When Kari becomes dangerously ill, Tai sets out to find some medicine in the adjacent city, and Izzy's laptop manages to attract some unwanted attention.

Synopsis
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 attempts to play kick back 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. The episode ends with Machinedramon attacking the group, specifically with the kids falling into a deep black hole, the innards of the destroyed building.

Digivolutions
(Number indicates order of occurrence.)

Quotes
"One thing is certain. Only a cactus could love this place."
 * —Sora comments on the desert road.

Tai: "I wasn't paying attention. We probably shouldn't have even brought her along." Izzy: "Huh?! What are you talking about?! We had to bring her! We need her if we wanna save the DigiWorld! She's one of the DigiDestined! Have you forgotten that?!" Tai: "Not at all, but her being sick... We should have left her some place safe. We should have split up so someone could take care of her while the others looked." Izzy: "Split up?! Tai, this isn't like you!" Tai: "I'm just a little... worried about her. It's all a part of what I do to be a good leader, Izzy."
 * —Izzy can see that Tai isn't being his normal self.

"This place is weird."
 * —Izzy ' s opinion of their refuge.

"No wonder this hospital's so clean! There's no sick people!"
 * —Agumon realizing the obvious.

"That's a doctor's kid for ya! There's never one around when you need him!"
 * —Tai ' s frustrated that Joe's not there to help them find the right medicine.

"Izzy shoots, he scores!"
 * —Tentomon on Izzy coming up with a genius plan.

"Lucky we're in a hospital 'cause it looks like we might need one."
 * —Tai and the others are faced with an army of Mekanorimon.

"I'm really getting tired of that sound."
 * —Tai is annoyed by the metal army's chanting.

Izzy: "How could I have not thought of that before?" Tai: "Good question! Now we're stuck here! Meanwhile, Kari's getting sicker and sicker because of you!" Agumon: "Stop it, Tai! What's come over you?"
 * —Tai releases his frustration on Izzy.

Hagurumon: "Does this mean what I think it does, my lord sir?" Machinedramon: "That you have the brains of a tin can?"
 * —Machinedramon can match wits with the best of them, especially when it comes to insulting his own lackeys.