Tracer

Composer

• 
  HowL

Director

• 
  Lee Seung Young

Screenwriter

• 
  Kim Hyun Jung

Main Role

• 
  Yim Si Wan

  Hwang Dong Ju

  Main Role
• 
  Go Ah Sung

  Seo Hye Yeong

  Main Role
• 
  Son Hyun Joo

  In Tae Jun

  Main Role
• 
  Park Yong Woo

  O Yeong

  Main Role

Support Role

• 
  Jun Ik Ryoung

  An Gyeong Hui [NTS Jungang regional office]

  Support Role
• 
  Moon Won Ju

  Ko Dong Won [NTS Jungang regional office]

  Support Role
• 
  Moon Soo In

  Kim Han Bin [NTS Jungang regional office]

  Support Role
• 
  Jeon Bae Soo

  Jang Jeong Il [NTS Jungang regional office]

  Support Role
• 
  Yeon Je Wook

  Park Seong Ho [NTS Jungang regional office]

  Support Role
• 
  Lee Kyu Hoe

  Lee Gi Dong [NTS Jungang regional office]

  Support Role
• 
  Yoon Se Woong

  An Seong Sik [NTS Jungang Regional Office]

  Support Role
• 
  Choi Jun Young

  In Do Hun [National Tax Service HQ]

  Support Role
• 
  Park Ji Il

  Baek Seung Ryong [NTS HQ commissioner]

  Support Role
• 
  Chu Sang Mi

  Min So Jeong [NTS HQ vice commissioner]

  Support Role
• 
  Choi Bum Ho

  Cha Byeong Hun [NTS HQ]

  Support Role
• 
  Lee Chang

  Lim Chang Seok [NTS HQ]

  Support Role
• 
  Kim Kuk Hee

  No Seon Ju [NTS Namju Regional Office]

  Support Role
• 
  Lee Do Yun

  Kim Yeong Tae [Prosecutors' office]

  Support Role
• 
  Lee Chang Hoon

  Ryu Yong Sin [PQ Group financial director]

  Support Role
• 
  Hwang Byung Kook

  Kim Seok Min [Reporter]

  Support Role
• 
  Mi So Yun

  Yun Seong Mi [Reporter]

  Support Role

Guest Role

• 
  Park Ho San

  Hwang Cheol Min [Dong Ju's father] (Ep. 1)

  Guest Role
• 
  Kim Il Woo

  [Gang Seong Tax Accounting CEO] (Ep. 1)

  Guest Role
• 
  Ju Yeon U

  Byeon Bong Suk (Ep. 1)

  Guest Role
• 
  Han Sang Chul

  [Angry wholesaler] (Ep. 1)

  Guest Role
• 
  Seo Seung Won

  [Tax accountant] (Ep. 1)

  Guest Role
• 
  Kim Ki Yeon

  [Gangnam madam] (Ep. 1)

  Guest Role
• 
  Jang Sung Yoon

  [Pregnant woman] (Ep. 1-2)

  Guest Role
• 
  Park Kyung Hoon

  [Pregnant woman's husband] (Ep. 1-2)

  Guest Role
• 
  Woo Hyun

  Yang Yeong Sun [Chairman] (Ep. 1-2)

  Guest Role
• 
  Jung Min Gyul

  [Gang Seong Tax Accounting manager] (Ep. 1, 7)

  Guest Role
• 
  Noreen Joyce Guerra

  [NTS employee] (Ep. 1, 7)

  Guest Role
• 
  Park Min Su

  Hwang Dong Ju [Young] (Ep. 1, 8)

  Guest Role
• 
  Cha Geon Woo

  Accountant Lim [Oz F&B tax] (Ep. 2)

  Guest Role
• 
  Kim Joon Bum

  Geum Dong Sik [Oz F&B] (Ep. 2-3)

  Guest Role
• 
  Park Wan Kyu

  Lee Yeong Seok [Oz F&B] (Ep. 2-3)

  Guest Role
• 
  Im Seon Woo

  Sin Da Hye [Oz F&B] (Ep. 2-3)

  Guest Role
• 
  Yoo Jong Yeon

  Han Gyeong Pyo [Oz F&B] (Ep. 2-3)

  Guest Role
• 
  Lee Han Ik

  Lee Jeong Ho [Yeong Seok's son] (Ep. 2-3)

  Guest Role
• 
  Kim Byung Gi

  Seo Byeong Gi [Jaesong Construction chairman] (Ep. 2, 7)

  Guest Role
• 
  Jo Seung Yun

  Seo Yeong Jae [Jaesong Construction CEO] (Ep. 2, 7)

  Guest Role
• 
  Na Seok Min

  Kwon Yeong Ho [NTS Joongang regional office] (Ep. 2-7)

  Guest Role
• 
  Jo Seung Yeon

  [Seong Sik's wife] (Ep. 3)

  Guest Role
• 
  Lee Jin Sung

  [NTS Jungang regional office staff] (Ep. 3)

  Guest Role
• 
  Oh Seung Chan

  [NTS Jungang regional office staff] (Ep. 3, 7-8)

  Guest Role
• 
  Kim Tae Baek

  [Bat man] (Ep. 4)

  Guest Role
• 
  Min Choong Suk

  Min Chang Sik [National Tax Service HQ] (Ep. 4-5)

  Guest Role
• 
  Choi Jung Hwa

  Cheon Ju Yeong [National Tax Service HQ] (Ep. 4-6)

  Guest Role
• 
  Choi Ji Yeon

  Seo Eun Hui [Hye Yeong's mother] (Ep. 4-6)

  Guest Role
• 
  Hong A Ron

  [NTS HQ inspector] (Ep. 4-7)

  Guest Role
• 
  Park Jin Young

  [Management division staff] (Ep. 4, 8)

  Guest Role
• 
  Kim Joo Ah

  [Chung Ho's mother] (Ep. 4-5, 7-8)

  Guest Role
• 
  Song Deok Ho

  Lee Chung Ho (Ep. 4-8)

  Guest Role
• 
  Kim Soo Hyung

  [Hye Yeong's sister] (Ep. 5)

  Guest Role
• 
  Im Yong Soon

  [Hye Yeong's father-in-law] (Ep. 5)

  Guest Role
• 
  Jo Yoo Jung

  [Hye Yeong's mother-in-law] (Ep. 5)

  Guest Role
• 
  Lee Yu Jin

  [Masseuse] (Ep. 5)

  Guest Role
• 
  Song Yeon Soo

  Kim U Gyun (Ep. 5)

  Guest Role
• 
  Lee Dong Geun

  [Police officer] (Ep. 5)

  Guest Role
• 
  Lee Ye Bit

  Seo Hye Yeong [Young] (Ep. 5-6)

  Guest Role
• 
  Yoo Dong Hun

  Dong Hun [Gold Cash loan shark] (Ep. 5, 7)

  Guest Role
• 
  Lee Suk

  [Gold Cash loan shark] (Ep. 5-7)

  Guest Role
• 
  Kim Do Hyun

  Cho Jin Gi [NTS Jungang regional office] (Ep. 5-7)

  Guest Role
• 
  Jang Joon Hyun

  Jang Jun Hyeon [NTS Jungang regional office] (Ep. 5, 7-8)

  Guest Role
• 
  Shin Gi Hwan

  Yoon Kyung Jin (Ep. 5, 7-8)

  Guest Role
• 
  Baek Sung Chul

  Ryu Do Hyeong [PQ Group] (Ep. 5, 8)

  Guest Role
• 
  Kim Young Sung

  Director Ju [Gold Cash] (Ep. 5-8)

  Guest Role
• 
  Park Sang Hwi

  Seong Su Hyeon [NTS Jungang regional office team leader] (Ep. 6)

  Guest Role
• 
  Choi Joon Hyuk

  Jin Seong Gwon (Ep. 6)

  Guest Role
• 
  Song Hoon

  [Auditor section chief] (Ep. 6)

  Guest Role
• 
  Oh Il Young

  [Ex police chief] (Ep. 6)

  Guest Role
• 
  Kim Jin

  [Tae Jun's secretary] (Ep. 6)

  Guest Role
• 
  Kim Pyung Jo

  [Time Wash employee] (Ep. 6-7)

  Guest Role
• 
  Seo Jeong Shik

  [Grand Cash CEO] (Ep. 7)

  Guest Role
• 
  Im Yu Ran

  [Yeong Jae's wife] (Ep. 7)

  Guest Role
• 
  Ahn Chan Woong

  Team Leader Lee [NT Service HQ] (Ep. 7)

  Guest Role
• 
  Shin Jae Hwan

  [Loan shark CEO] (Ep. 7)

  Guest Role
• 
  Park Jung Min

  [Bureau 4 section chief] (Ep. 8)

  Guest Role
• 
  Lee Gun Myung

  Ha Ung [Prosecutor's office] (Ep. 8)

  Guest Role
• 
  Yoon Kwan Woo

  [Restaurant staff] (Ep. 8)

  Guest Role
• 
  Jo Joon Hyung

  Nam Si Hun [Assemblyman] (Ep. 8)

  Guest Role
• 
  Jung Sae Byul

  Cho Seon Min

  Guest Role
• 
  Jeon Jeong Il

  [Debater]

  Guest Role
• 
  Hong Seung An

  [NTS Team 2 Investigator 1]

  Guest Role
• 
  Park Ji Won

  [Investigator]

  Guest Role
• 
  Park Kyung Joo Guest Role

Unknown

• 
  Lee Ru Da Unknown
• 
  Kim Zio Unknown