A young boy gets possessed by the demon king's betrayer son, Death. He later finds that when death got intercepted and got trapped in his body he was on a mission to help Heaven stop the war between Hell and Heaven. He is the key to stopping the war and the only way to get the information from death is by training and gaining memory from his possessor. With the help of his friends Deke, Emme and Rose, Uruwi goes on adventures destroying demons that try to cause chaos in his day to day life.