Yoo Han, who lived a crazy life, threatening and committing violence by entering a loan company at the age of preparing for the CSAT and receiving money. Then one day, he loses his family at the hands of someone who is vindictive of him. Feeling guilty of the death of her family, Yoo Han lives without a break, trying to atone for her hard work. Then, accidentally, he learns that his old roommate Song Myung-shin contributed to his younger brother's death, and decides to take revenge on him. And Yoo Han faces a man who says, "I'll help you."