| High school sweethearts Jung-woo and Soo-yeon were separated in a horrifying tragedy that continues to weigh down on them as adults. Now a guilt-ridden detective, Jung-woo has been desperately searching for Soo-yeon for years, but when he crosses paths with her again, she has already become someone else with a new identity. |
| Name | Character | Episodes |
|---|---|---|
| Kim So-hyun | Lee Soo-yeon (young) | 21 |
| Yeo Jin-goo | Han Jung-woo (young) | 21 |
| Lee Se-young | Han Ah-reum | 21 |