The diligent salesman worked hard for several months and finally signed his first order, but he accidentally discovered his boss's affair and was targeted. His boss fired him for not billing him, and he was harassed and humiliated in every possible way even when he produced his voucher. When he was in a desperate situation, he unexpectedly learned that he was the lost son of the richest man. He received huge financial support, and then acquired the original company, fought back against those who had bullied him, and started a counterattack life.