Kang Sunwoo, a former promising taekwondo athlete, now lives a life of poverty and exhaustion. One day, while carrying the weight of her painful past, she is suddenly thrust into the spotlight when people notice her uncanny resemblance to a woman named Han Jiyeon. The problem is, Han Jiyeon is the main perpetrator of a ‘drunk driving hit-and-run death case’ and also the heiress of a major conglomerate. As public anger and media scrutiny intensify, the wealthy family secretly searches for a body double to protect their granddaughter. Thinking of her worsening mother’s illness and her lost dreams, Sunwoo accepts the dangerous proposal in exchange for a large sum of money.