Song Che, a boy from the Black Fox Tribe, and Li Yu, a girl from the Red Fox Tribe, were supposed to go to the mortal world to experience, but they accidentally fell into the eighteenth floor of the underworld. In order to find their way back, the two agreed to Yama to become a small government servant of the underworld, gain a foothold in the casino, get acquainted with forces, recruit ghost soldiers, and grow from ignorant children to the underworld overlord. They passed through eighteen levels of treacherous levels, met Xie Hong, the little princess of the Xie family, and Martin, the young master of the Ma family, and joined forces to quell the chaos of the evil gods in the abyss. Finally, they returned to the fairy world with more than ten thousand elite soldiers to quell the monsters and subjugate the four directions. They counterattacked from the underworld servants to the powerful generals of Pingtian, composing a legend of the rise of young people with passion.