Song Jinming (played by Li Yixiang) and Tang Zhaoyang (Wang Shuangbao) are professional con artists, running an intricate scam they have perfected through repeated practice. They find a naive young man looking for work, and convince him that they have arranged three lucrative coal mining jobs for themselves and a relative. The relative has not arrived in time, leaving a gap which they generously offer to the victim, on the condition that he pretend to be the missing relative. After a few days of working in the mine, they murder the victim, and by making the murder look like an accident, they use his death to extort compensation money from the mine's management.