The exorcists are busy dealing with the high-ranking demons that begin appearing in urban areas. Shura heads the forefront in Ikebukuro. The number of people who are able to see demons increases as a result of gaining a Temptaint, and the world falls into chaos. At the same time, Yukio threatens Suguro with his gun and tries to get him to learn about the details of Lightning's investigation. Yukio refuses to heed Shima's warnings and grows increasingly isolated. He returns to Tokyo for a mission and encounters Lightning.

Yukio is arrested on suspicion of shooting Mephisto. After learning about Yukio's eye, Rin decides to escape from The Order with his brother. With the help of the Exwires and Amaimon, he heads off to rescue Yukio. Severely injured by the gunshot, Mephisto decides to abandon the barrier he placed on the artificial Gehenna Gate in order to maintain his possessed body. As a result, the gate opens completely, and a horde of demons emerge. The atmosphere of Gehenna thoroughly envelops Assiah...