A legendary necromancer known as the Corpse God is finally slain by a hero—only to wake up in the body of Polka Shinoyama, a newly assassinated boy in present-day Tokyo. Can the sorcerer survive in this strange new world?

Polka is settling into his new life when a man arrives begging Misaki to save him from gangsters. Polka sends her with him, but the job isn't what it seems. Meanwhile, other factions in Shinjuku investigate Polka's role in the fire.

Polka is about to resume business as usual when he gets two unexpected houseguests: his niece Sayo and her bodyguard! Do the pair just need a place to crash, or is something more sinister at play? And Inspector Iwanome is still on Polka's track.