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In flashbacks, various suspects and their motives are revisited days before the murder. A skeptical detective questions Hi-soo's amnesia.
Lee Bo-young
Seo Hi-soo
Kim Seo-hyung
Jung Seo-hyun
Lee Hyun-wook
Han Ji-yong
Ok Ja-yeon
Kang Ja-kyeong
Cha Hak-yeon
Han Soo-hyuk
Jung Yi-seo
Kim Yu-yeon
Park Hyeok-kwon
Han Jin-ho
Park Won-sook
Yang Soon-hye
Jeong Dong-hwan
President Han
Ye Su-jeong
Emma
Park Seong-yeon
Joo Min-su
Lee Jung-ok
Kim Seong-tae
Kim Hye-hwa
Han Jin-hee
Jo Eun-sol
Park Jeong-do
Jung Hyeon-jun
Han Ha-joon
Jo Yoon-seo
Oh Soo-young
Yoon Geumseon-ah
Hwang Kyung-hye
Kim Jung-hwa
Suzy Choi
Choi Young-jun
Baek Dong-hun