Shinji and Ren are forced to track down Yui as she confronts her brother about her connection to the Rider War and their childhood memories. Reiko tries to find Takeshi's younger brother, believing that will change him for good, only to discover that Takeshi used his younger brother to feed his Contract Monsters. As Ren, Shinji and Shuichi battle against Takeshi, he unleashes a new Card that does something the Riders didn't expect to happen.