Rin, Yukio, Shura and Arthur join forces to bring down the Gehenna Gate with no success. Meanwhile, demons keep coming through it and giving a hard time to the other Exorcists until the Esquires come up with a plan to open a gate to the Vatican, where it is already daytime, and reflect the sunlight there to the Academy, where it is nighttime, to weaken the monsters protecting the Gehenna Gate. Rin and Yukio manage to seize this opportunity and, when both unlock their demonic powers together, they fly through the gate and destroy it. One month later, things are back to normal at the Academy and the Okumura twins pay a visit to their mother's grave before returning to their duties as Exorcists.