The new mechs are to be sent to Fort Casadeus, where the powerful Marquis Dixgard will take personal command over them. But on the way, a group of raiders lure demon beasts into attacking the convoy, hoping to steal them for their own.

The Jarodeks launch a counterattack with a powerful flying wyvern mech. Ernie fights back, but his foe this time is far smarter than before, and has a new trap that can defeat even the Ikaruga!