A true-crime enthusiast and a washed up cop facing demotion launch a joint murder investigation to help a mutual friend who is wrongfully charged with murder.


Jeong-hoon Kim


Jeong-hoon Kim





Credited cast:
Sang-Woo Kwon ... Kang Dae-man
Dong-il Sung ... Noh Tae-soo
Yeong-hie Seo ... Mi-ok
Rest of cast listed alphabetically:
Park Hae-Joon ... Joon-Soo
Lee Il-Hwa ... Detective No's wife
Oh Jeong-Se ... Hospital patient
Dae-han Ji Dae-han Ji ... Jang-Ho
Bok-rae Jo Bok-rae Jo ... Lee Yoo-No
Kim Joo-Heon ... Gang leader
Park Jun-Myun Park Jun-Myun ... Bakery shop woman
Yoon Kyung-Ho Yoon Kyung-Ho ... Det. Ma
Seung-Joon Lee Seung-Joon Lee ... Yong-Gyu (as Seung-joon Lee)
Moo-Je Min Moo-Je Min ... Sun-Hye's husband
Sung-Il Park Sung-Il Park ... Detective Song
Min-chae Yoo Min-chae Yoo ... Hot Barista


Dae-man is a crime enthusiast who runs a power blog about the country's biggest cold cases. He aspired to be a homicide detective but after years of failed attempts, he now runs a comic store. He walks on eggshells around his wife for failing to provide for the family. But he cannot help himself making daily trips to the police station. One day, his best friend and detective, Jun-su, is charged with the murder. Dae-man sets out to investigate to prove his friend's innocence. Only the washed up Detective Noh offers to help his colleague in trouble. A cold case specialist blogger's theory coupled with field experience of a seasoned detective and the two launch a joint investigation into their friend's alleged murder. Written by CJ Entertainment

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Plot Keywords:

murder | See All (1) »


Comedy | Crime | Thriller


PG-13 | See all certifications »

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Followed by The Accidental Detective 2: In Action (2018) See more »

User Reviews

genius, mysterious & funny!
19 February 2017 | by fluffsetSee all my reviews

Korean have done a lot of whodunit crime movie, so I guess that's why some critics call this movie cliché. For me, this movie is so funny as hell! And we cant even know who is the killer is, its so unpredictable and fun to enjoy. Someone said that its impossible for Daeman character to become a genius detective just by reading detective novel, what kind of argument is that? Do movie need to be realistic as our daily life, a great movie is the kind that show something that's not ever or unlikely to happen in our everyday life, so that's what make this movie special. An average funny joe solve a murder case, finding culprit while carrying his baby too. That's what make this movie funny and I'm laughing so hard watching this. There is some flaw but they cover it up by showing Daeman's life with his family that's so hilarious. As I said a lot of time before, this is korean movie style that you cant find in any American movie. They stick you on your sit till the end. If you love "Memories of Murder" and "The Chaser", you will love this!

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South Korea



Release Date:

24 September 2015 (South Korea) See more »

Also Known As:

Tam jeong: Deo bigining See more »

Filming Locations:

Seoul, South Korea


Box Office


KRW0 (estimated)
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Company Credits

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Technical Specs


Sound Mix:

Dolby Digital



Aspect Ratio:

2.35 : 1
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