When Soo Jin (Eugene) stumbles upon a stranger (Ji Sung) who's completely lost his memory, she gives him the name "Jan Ho" and vows to nurse him back to health. But just as their love is beginning to blossom, Jan Ho mysteriously disappears and Soo Jin's father unexpectedly dies, leaving her bereft and doubly heartbroken. Little does she know that Jan Ho's learned his true identity and that someone is plotting to kill him.