One year had passed since the battle in the Sanctuary, and Subaru had been living a fulfilling life with the Emilia camp until he was invited to Pristella by Joshua and Mimi, messengers of Anastasia.
Sirius Romanéconti, the Bishop of the Witch Cult of the Great Sin "Wrath," kills Subaru. Subaru tries to stop Sirius' murderous deeds but is trapped in suspicion and attacked by Sirius' chain attacks.
Following a chaotic incident, Priestella descends into turmoil as Emilia is kidnapped. Subaru and companions embark on a mission to save her and restore order.
Subaru and his comrades find themselves in a dire situation after the city was taken over by the Sin Archbishops. Now, they are devising a plan to first reclaim the city hall.
The attack on the city hall enters its second phase. Subaru and Crusch breach the interior, but there they are awaited by Capella, who has some sneaky tricks up her sleeve.
After a disastrous outcome against the Witch Cult, Subaru is woken up to find Priestella devastated by the flood, with evacuation shelters in a tempest of emotions. Emilia remains trapped in Regulus's schemes as she discovers his cruelty.
Through a Witch's Cultist's conference mirror, Emilia tells Al where the Sin Archbishops are and asks him to protect Beatrice. Al relays Emilia's message to Subaru, and the gang begins to devise a strategy to win back the control towers.
Subaru and the others hold a meeting in the city hall to develop a strategy against the four Sin Archbishops. However, Emilia is slowly running out of time.
