Pakkon, the son of the Demon King, is sent to the human world by his father to "increase the number of people who do good things because hell is full of bad people. But from Heaven, which is also full, the a...

In this era, demons and monsters roam the streets at night. Humans and familiars work as partners who kill those monsters. Civil servant Fan Xiaotie and the strongest demon girl Linyu of the secret departmen...