Framed by his father and stepmother, Dohyeok dies in prison. Dohyeok gets a second chance at life, waking up as a 10-year-old. With knowledge of the future, the world feels like an open vault. But he's after the truth about the mother he thought had abandoned him and the people who drove him to his death. With the mind of an adult, he outsmarts grown-ups and carefully plots his revenge.