With each day feeling hopeless and bleak, Kang-jin's life takes a dramatic turn when he stumbles upon a lost envelope of money belonging to Rang. Using this newfound wealth, he takes a stand against Nam-young's girlfriend Da-young. But when Nam-young discovers Kang-jin's actions, he strikes back by stealing his money and issuing dangerous threats. With nowhere to turn, Kang-jin confides in Rang, who reveals a secret knowledge of the debt-collecting world. Together, they embark on a thrilling journey of power and control, as Kang-jin takes his first steps into the world of loan sharks.

In his 40s, the stuntman Woo-seok wishes to go back to the prime of his life in 1997, before a facial scar ended his acting dreams. One day, he purchases five talismans from an unknown monk, hoping to change his life. However, during a film shoot, a car accident transports him back to his high school days in 1997. Now living as the high school student, he embarks on a project to revamp his past life, which was filled with a troublesome father, son, and husband.

After being appointed as the vice-principal of her alma mater, Eun-hee becomes plagued by hallucinations. Branded a troublemaker by the teachers, Ha-young hears strange sounds coming from the school's dilapidated restroom.