A powerful rival to Astora appears! Astora's own funny videos start getting lots of dislikes... which leads to a fight with Musimon?!

The dates of December 24th and 25th disappear from smartphone calendars worldwide! Ai is despondent at the thought that the Kashinoki Books Christmas celebration might not go through. But just then, Gatchmon sees something!

Two years ago, Rei was spending sleepless hours searching for his brother trapped in the sea of the 'net. But just as he caught Leviathan's trail, he ended up in danger of being hacked himself! Just then... Hackmon appeared!

The team can't reach the deep web until they take back Weatherdramon! As they race to retrieve the stolen chip from Mienumon, she too undergoes an App Fusion with an Ultimate Appmon!

The App Driver team heads to a hot springs, but their travel app takes them to a creepy traditional inn instead! The scenery is scary and they get soaked to the bone... Something's got to be wrong here!

Haru and the others have saved Eri, but they're confronted by the Ultimate Four Appmon! The team Ultimate Apprealize all their Appmon to face them.

Hajime, finally himself again, learns of Operation: Human Applications, a plan to turn all of humanity into easily-regulated data. And the key to stopping Leviathan's terrible plan is... Bootmon?!

A massive shadow appears in the skies and throws the city into chaos! Who would have thought Leviathan would apprealize, too? Haru gets the Gaiamon chip, but can he bring back his best friend Yujin?