A Hard Day

The war for a dirty secret.

After trying to cover up a car accident that left a man dead, a crooked homicide detective is stalked by a mysterious man claiming to have witnessed the event.

Lee Sun-kyun

Go Gun-su

Cho Jin-woong

Park Chang-min

Jeong Man-sik

Detective Choi

Shin Jung-geun

Chief of Homicide

Shin Dong-mi

Younger sister

Heo Jung-Eun

Min-a

Kim Dong-young

Detective Doh

Ju Seok-tae

Detective

Park Bo-gum

Officer Lee Jin-ho

Lee Ji-hoon

Police Officer of Chemistry Storage

Kim Bo-kyung

Ex-wife

Kim Kang-hyun

Young-cheol

Kim Hae-gon

Vault owner

Ki Joo-bong

Mr. Kim

Bae Yoo-ram

Police officer

Jang In-sub

Police officer

Seo Hyun-woo

Police officer

Jang Jun-nyeong

Mr. Choi