A "good-for-nothing" son-in-law who was forced to lend money by the loan sharking system was "tortured" by the system with outrageous loan sharking interest while being forced to lend huge sums of money, but he managed to survive from desperate situations again and again. He was forced to fight back from a loser to a being that everyone looked up to on the road of "paying back debts." But when the ultimate secret of the system was revealed, he realized that this was not only a counterattack, but also a self-salvation.
