Despite the protection of Zeldris, the King of the Demons, the Four Knights of the Apocalypse cannot reach their destination because of the rain of fire that falls on the Hells. Percival Squad takes advantage of this setback to train, without knowing that Gawain was captured by the seven Knights of the Chaos led by Mortlach, always in pursuit of them. One of them holds the fragment of the Coffin of Eternal Darkness... As the vise tightens, the Four Knights of the Apocalypse and their companions head towards the giant monster Behemoth, and the fight against the opposing camp is finally engaged! In the middle of the battle, Percival discovers his true identity...