Suspect

Nick Cheung Ka-Fai

Kwok Man Bun / Zero / Kwok Man Shing

Zhang Yishang

May Chou

Patrick Tam Yiu-Man

Wong Sir

Niki Chow Lai-Kei

Lee Wai Lam

Liang Yongqi

Kevin

Sammy Hung Tin-Chiu

Ma Tong Tat

Michael Tong Man-Lung

James

Jiang Shan

Lau Chi Wai

Bao Wenjing

Chor Hei

Du Juan

Director of the Orphanage

Wang Zun

Peter

Lam King-Kong

Lawyer

Li Zhaocai

Collin

Wang Xin

Wang Zhe

Lu Yao

Paw Yu Ming

Andy Lee Do-Yue

May's Father

Qiao Hua

Siu Wan

Wang Siqin

May Chou's Mother

Ying Xue

Nurse Chan

Wang Qianru

Undead Nurse