One night, Damon, a demon who dreams of becoming the next Great Demon Lord, is entrusted with a “mysterious child” by his dying best friend.
While Damon expected to receive a soul as his reward, his friend passes away and ascends to Heaven before the deal is sealed. Now, due to a breach of contract, Damon has lost his demonic powers. To make matters worse, a curse has bound him to the child, making it impossible for them to be separated by more than a short distance.
With no other choice, Damon sets off for the Celestial Realm with the baby in tow—only to find himself hunted by relentless demons determined to snatch the child away.
Alongside a meddling angel, a bat-shifting mafioso, and a samurai trapped in the body of a goose, Damon embarks on a journey through strange twists of fate to break the curse once and for all.