One afternoon, Kiyoshiro and Jellymon find a lost little girl named Yuina at a department store. Yuina becomes fond of Kiyoshiro due to the similarities between her doll's appearance and him. When he attempts to take her to the lost child center, the group gets attacked by Kodokugumon.
A swarm of Kodokugumon attack the people while hiding in the shadows. There's a thick fog surrounding the department store, so even if they tried to run, they wouldn't be able to see their way around outside to escape. In addition, the fog is causing people to collapse.
Hiro and Ruli hear about the commotion of a thick fog covering a singular corner of the city and arrive at the scene. Unable to get in contact with Kiyoshiro, Angoramon flies up to the skies to check out the situation when he senses the presence of a particular Digimon.
NOTE: This episode was great in so many ways. 1) Kiyoshiro was in his brave mode for most of it. 2) Jellymon evolves!!!