Houtaro, Rinne, and Supana transform into Riders in front of Geryon, who tries to open the dark door! Geryon also transforms into Dread and tries to steal the Gotchardriver.
However, Iron Gotchard soon reaches the limit of his strength and is attacked by Dread, causing him to untransform. Geryon gets the Gotchardriver and finally opens the door to darkness...!?