The money for the off-campus teaching trip of Youyi's class was stolen, and the person who stole the money was one of his five best friends. Because that person owed 20 million in debt, he stole the money for the trip as the registration fee for his friends' game, and wanted his friends to help pay off the debt. Although the five people didn't know who did it, based on friendship, they decided to take the responsibility together and participate in the game. But things were not as simple as imagined, because one of them betrayed his friend.