After Sovngarde, Alduin's body was destroyed. Barely being able to be defined as an existence, he was sealed inside a Sacred Gear: World End. He waited patiently for revenge, and inside his host Issei Hyoudou, Alduin might have the chance to bring divine vengeance down on those who wronged him. He is Alduin, the Armageddon Dragon and Evil Dragon King. He will not be stopped.

In a fierce battle, Issei and Co get teleported to Tamriel. There they meet the Dragonborn, who noticed the blood of the Dovah run through Issei's body. What will arise from this? Will they ever get home?