Rei Kishibe Ultra Digivolve To?! Crusadermon!!!

Scar and Nokia travel through the Nakano Underpass heading for a place called Roppongi where they believe Yuuko Kamashiro is being held captive. On the way a mysterious person creeps up behind them with an urgent request, "please let me tag along with you guys to save Yuuko!"

The gang arrives in the underground facility where Yuuko Kamashiro is being held, and beside her is the vile Rei Kishibe, Yuuko's captor. Rei Kishibe reveals to the group something no one could have imaged, Rei Kishibe actually isn't Human! Rei Kishibe has another name, she is actually Crusadermon of the Royal Knights!

A massive gateway to the Digital World opens up in the sky and masses of Digimon fall into the Human World. This gateway closes not to long after it opens thanks to Arata Sanada's impressive hacking skillls, puttiong a whole is Crusadermon's plot to destroy the Human World.

An Eater attaches itself onto Yuuko Kamashiro, and a fierce battle between this vile creature begins. Will Scar and Company be able to save Yuuko?