Geryon has unleashed the deadliest Malgam to open the door to darkness. Rinne and Supana transform into Riders to face him, but they are cornered by his powerful force. Houtaro transforms into Iron Gotchard to save them. They go head-to-head, but gradually his strength is depleted and he is unable to transform. Just when all seemed to be lost, Fuga appears. "I will light the way for these youth." And then Fuga...!