Kang Moo Han is a cheap loan shark who suddenly died in a car accident. A few moments after his death, a mysterious black hole suddenly appeared. And now his goal is to become the ruler of the underworld. In order for him to achieve his objective, he has to complete all the quests and challenge the other kings of the underworld, who are also eagerly waiting for an opportunity Will he be able to achieve his goal and become the god of death?