Han Jung-woo and Lee Soo-yeon are high school classmates who fall deeply in love under the shadow of tragic circumstances, as Soo-yeon is the daughter of a murderer and suffers severe bullying. After a brutal kidnapping incident tears them apart and leaves Jung-woo believing Soo-yeon is dead, both of their lives are shattered. Fourteen years later, Jung-woo has become a determined homicide detective driven by guilt and the desire to find his first love, while Soo-yeon returns under a new identity as a talented fashion designer, harboring deep psychological scars and a thirst for vengeance against those who destroyed their lives.