While passing by a village in the woods of the northern lands, Frieren and party meet Sein, a gifted priest who is nonetheless corrupt enough to give even Heiter a run for his money. But what happened in his past?

Naofumi's party regroups and plans another assault on the Emperor Dragon. While their plan of attack comes together, Wyndia explains her connection to the dragon. This causes Wyndia to remember something very significant...

Hiling and her band of knights face intense opposition from the forces under the command of the Magic Mirror. When the fighting takes a desperate turn, Apeas's loyalties are tested. In the castle town, Ouken launches his own independent attack.

Todo points out that Itadori's Divergent Fist is a technique that won't work against special grades. When Itadori genuinely accepts his advice, Todo decides to face him and guide him with his full might. Meanwhile, Kugisaki picks a fight with Kyoto's Nishimiya. From the sidelines Mechamaru fires an attack at Panda, sparking the start of their battles with Kugisaki against Nishimiya and Panda against Mechamaru.

The Kyoto Sister School Exchange Event's group battle begins. Kyoto's Todo rushes to attack the Tokyo students, but Itadori takes on the role of stopping him and faces off against him. Itadori's overwhelmed by Todo's power, but suddenly Todo asks him what kind of woman is his type--

Trapped in a cell beneath the school, Koga meets a forgotten Saint. By working together they are able to break out of the jail cell, but the darkness has covered everything. Will Koga be able to save his friends and who is the mysterious girl pretending to be Athena?

Koga senses the arrival of a familiar Cosmo, Athena. Rushing to meet her, he finds it is not Saori, but a scared girl asking for help. The Headmaster appears and explains everything to Koga, then reveals he is Capricorn Ionia, a Gold Saint.

After a rough win, Koga has a renewed vigor to win the tournament, but his next opponent might be his toughest. Yuna has her next match against the water element user, Delphinus Guney and the stage is set to his favor.

The fights are starting and the Saints are prepping, except for Koga. His focus is only toward beating Orion Eden and winning the tournament. His first opponent, Circinus Hook., gives Koga some prophetic advice

Koga calls on his friends to burn their Cosmo!

A former Saint comes to help the team in their darkness moment.

The Saints are on a camping trip nicknamed “Hell Camp”. Their goal is to reach the Cosmo Delta before deadline. Those who make it get a chance to participate in the Saint Fight, with the winner being promoted to a Silver Saint. With such high stakes, not everybody is going to play by the rules.

Abzu has taken complete control, and things look bad for the Bronze Saints. But a chance of salvation might happen, but it is up to Eden.

Betrayed by his Sister, Amor tries to kill Koga but the seed planted before has sprouted and true darkness has arisen.

With Mars gone, Medea’s final plan can finally start as her brother comes to finish off Koga and Eden.

Can Eden and Koga defeat the God of War, Mars whose power has surpassed Athena’s?

Koga finally confronts Mars and before their battle reaches the peak, Eden steps in and Mars tell him how he became the war god.