A mysterious woman enters the life of Suk-won, a lawyer who has lost his memory. As their relationship develops, secrets embedded in his memory slowly surface.
| Actor | Role |
|---|---|
 Jung Woo-sungSeok-won | Seok-won |
 Kim Ha-neulJin-young | Jin-young |
 On Ju-wanDong-gun | Dong-gun |
 Im Joo-eunBo-young | Bo-young |
 Jang Young-namKim Young-hee | Kim Young-hee |
 Kwon Hae-hyoPark Kyoung-joon | Park Kyoung-joon |
 Bae Sung-wooOh Kwon-ho | Oh Kwon-ho |
 Heo JinSeok-won's Mother | Seok-won's Mother |
 Lee Jun-hyeokShin Hyun-ho | Shin Hyun-ho |
 So Hee-jungPsychiatrist | Psychiatrist |
| JJo Yi-jinSun-hee | Sun-hee |
 Choi Gyu-hwanProsecutor | Prosecutor |
 Son Ji-naSeo | Seo |
 Cha Chung-hwaWedding Hall Staff | Wedding Hall Staff |
 Kang Suk-wonBehavior Examiner | Behavior Examiner |
 Kim Bong-geunElder | Elder |
 Lee Si-eonDoctor (voice) | Doctor (voice) |
 Lee DalPolice | Police |