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.

Two twenty year olds, Kim Hye Rim and Lee Ki Kwang, who attended the same middle school, meet again coincidentally after many years as a college student and an idol group member. Lee Ki Kwang is a member of popular idol group falls in love with Kim Hye Rim, his old friend from same middle school who has never dated before, as the two try to keep their love a secret from the rest of the world.