In order to prevent the hidden dangers caused by the war, the ancient Apocalypse and the Five Heroes went to the tenth world to stop the demons. After going through ups and downs, they finally eliminated the brother of one of the demons. When they came to their senses, their brother was gone. Apocalypse has exhausted his power. In order to prevent the impossible change, he gave his power to his disciple Long Tuna, one of the Five Heroes. He also instructs the Five Heroes to enter reincarnation and become stronger after experiencing hardships in the world. After the demon world learned about it, it tried its best to stop it, causing the five heroes to enter reincarnation by mistake and lose their memory and power. When they are far away from each other, the danger that awaits them is approaching.