The four of them are ordinary and unremarkable college students, and the four of them are feared experts in stealing jewelry. They are not short of money and can be said to have a lot of wealth, but they don't like to use money to buy jewelry. They like to steal it themselves. They formed a gang called the Ghosts, a gang that the police hated. No one has ever seen them, some say they are gods, some say they are phantom thieves. They call themselves ghosts and demons.