1x1 - Episode 1

May 24, 2024

Jang Jaegyeong is the Anhyun Police Station's Narcotics Unit's ace. One day, while pursuing drug dealers, Park Joonseo, a friend who hasn't been in contact for 20 years, comes to visit him. The following day, Joonseo's cold body is discovered, and Jaegyeong gets abducted and forced to become addicted to an unknown drug.

1x2 - Episode 2

May 25, 2024

As Jaegyeong chases down those who abducted him, he finds out that Joonseo's body has been handed over to the family for a funeral without an autopsy. He rushes over to Joonseo's funeral, where he sees friends from 20 years ago gathered. Soon after, Joonseo's will gets read in front of everyone, stating the names of those who get to share his 50-million-dollar life insurance payout.

1x3 - Episode 3

May 31, 2024

While everyone is in utter confusion after hearing the names of the beneficiaries in Joonseo's will, Won Jongsoo, Park Taejin, and the rest of the friends adamantly oppose an autopsy for Joonseo's body. However, at the request of Joonseo's wife, Choi Jiyeon, they proceed with the autopsy. Meanwhile, Jaegyeong and Oh Yoonjin search the house of Lee Myeonggook, the third name on Joonseo's will, to learn about his identity.

1x4 - Episode 4

June 1, 2024

Jaegyeong suspects Kim Changsoo might have something to do with how he got abducted and drugged, and Yoonjin visits Jiyeon's house but sees someone unexpected. While investigating the area where Joonseo was found dead, he discovers a CCTV camera by a mill and finds a lead in the case.

1x5 - Episode 5

June 7, 2024

The CCTV server, the only lead to the case, disappears in flames. Jaegyeong senses that someone is actively interfering with the case. Jaegyeong, Yoonjin, and Joosong track down the address of Audiophile, the company Joonseo had founded, and there, they meet Min Hyeonwoo, a high school student who knew Jaegyeong and Yoonjin would come.

1x6 - Episode 6

June 8, 2024

Jaegyeong learns about the connection between the Lemon Mulberry drug and Joonseo's death, while Jongsoo proposes the development of a bioindustrial complex in Pilo-dong. At that time, Jaegyeong obtains the Lemon Mulberry dealer's contact and plans to set up a deal as a buyer while under disguise as a druggie.

1x7 - Episode 7

June 14, 2024

Yoonjin makes her way to the director's office of the Woonjong Medical Center to investigate the medication error incident further. However, she faces an unexpected crisis. Meanwhile, Jaegyeong watches dashcam footage from a vehicle that was spotted on the day of Joonseo's death and freezes when he sees an unexpected person appear.

1x8 - Episode 8

June 15, 2024

Jaegyeong puts the puzzle pieces together of the day Joonseo died, and a rift between Jongsoo, Taejin, and Jiyeon pushes them apart. Meanwhile, Jaegyeong, Yoonjin, and Joosong visit Hyeonwoo, discover the whole story between Joonseo and the medication incident, and then find a clue to the murder at the mill.

1x9 - Episode 9

June 21, 2024

Jaegyeong knocks on Jeong Yoonho's door to arrest him for the murder of the mill owner. Meanwhile, Jaegyeong, Yoonjin, and Joosong gather at Jaegyeong's house to look over Myeonggook's work log. Joosong prepares a surprise birthday cake for Yoonjin, but an unexpected guest comes.

1x10 - Episode 10

June 22, 2024

Taejin helps Yoonho stay in hiding. However, Yoonho is getting harder and harder to control. Meanwhile, Jaegyeong closes in on the Lemon Mulberry distribution group, Gong Jinwook, and chases down the person who had abducted and drugged him into addiction, leading him to the antique shop run by CEO Yoon.

1x11 - Episode 11

June 28, 2024

With CEO Yoon dead and the only subordinate who could testify also dead, the case turns into another enigma. Meanwhile, Jaegyeong gets Yoonho's location through Kang Sijeong and heads to arrest him, and Yoonho, who is now at the point of no return, charges at someone in his last attempt to survive.

1x12 - Episode 12

June 29, 2024

Jaegyeong narrows the investigation, while a rift forms between Jongsoo, Taejin, and Oh Chihyeon due to Yoonho's uncontrollability. Meanwhile, Jaegyeong and Yoonjin meet with Jeong Sangae, and he takes them to Youngryun Cold Storage, promising them he'll tell them the truth.

1x13 - Episode 13

July 5, 2024

Jaegyeong, Yoonjin, and Joosong meet No Gyumin and Chae Gyeongtae's mother, and they hear the story behind the fire incident that happened 20 years ago. Meanwhile, Taejin fights back at Chairman Won and Jongsoo, who both want to abandon him, and Jaegyeong gets ready to arrest Jinwook in his attempt to flee the country.

1x14 - Episode 14

July 6, 2024

Jaegyeong, Yoonjin, and Joosong learn the full story of what happened on February 23, the day Joonseo died. The connection between friends driven by desire and greed in the name of friendship comes to a tragic end. At the end of it all, the three friendships Joonseo wished to protect sit together and reflect the true meaning of friendship.

1x15 - Episode 15

July 12, 2024

1x16 - Episode 16

July 13, 2024

Ji Sung

Jang Jae-kyung, Jang Jaegyeong

Jeon Mi-do

Oh Yoon-jin, Oh Yoonjin

Kwon Yul

Park Tae-jin, Park Taejin

Kim Kyung-nam

Won Jong-soo, Won Jongsoo

Jung Yoo-min

Oh Soo-hyun, Choi Jiyeon

Jung Soon-won

Heo Joo-song, Heo Joosong

Yoon Na-moo

Park Joonseo, Park Joon-seo

Seo Yi-ra

Oh Soo-hyeon, Oh Soohyeon

Jeong Jae-kwang

Kim Chang-soo, Kim Changsoo

Cha Yeob

Oh Chihyeon, Oh Chi-hyeon

Lee Kang-wook

Jeong Yoon-ho, Jeong Yoonho

Cho Han-gyeol

Jang Jae-kyung(Young), Jang Jaegyeong (Young)

Kim Min-ju

Oh Yoon-jin(Young), Oh Yoonjin (Young)

Yoo Hee-je

Gong Jin-wook, Gong Jinwook

Park Keun-rok

Jeong Sangae, Jeong Sang-wooi

Ryu Hye-rin

Kang Sijeong, Kang Si-jeong

Park Jung-pyo

Yoo Kyeong-hwan, Yoo Gyeonghwan

Yoon Sa-bong

Jeong Yeon-joo, Jeong Yeonjoo

Moon Sung-keun

Won Chang-ho, Won Changho

Han Hyeon-jun

Min Hyeon-woo, Min Hyeonwoo