An ordinary office worker who is not very good at socializing, has few friends, and has no career. One day while surfing the Internet, he was summoned to a special space. In addition to the protagonist, there were several other people there. He had to solve a puzzle to get out alive and get freedom. Some of them are undercover agents, and some are wolves. Every day, one or two people will die. On the third day, if you don't solve the puzzle, you will die.