The lives of bad people with bad luck slowly come together and come crashing down: Jung-man barely gets by working at a sauna and taking care of his sick mother until he finds a bag full of cash in the locker room. Tae-young is in trouble because his girlfriend ran away with the money he borrowed from a loan shark. Soon, a mysteriously dead body is found. Mi-ran, who is stuck between her violent husband and a dead-end job as a bar hostess, meets Jin-tae, a young man who offers to kill her husband. And now the game of "dog eat dog" begins.