The arrival of the promising young officer, Han Ju-won, stirred a ripple of anticipation through the precinct. He was promptly paired with Lee Dong-sik, a detective known for his unconventional methods and haunted by a devastating loss.

The finding of an unidentified human skeleton casts a pall of unease. Dong-sik pulls Kang Min-jeong away from the Seoul nightclub and back towards the city.

Doubt regarding Dong-sik’s complicity deepened within Ju-won. The unexpected appearance of an anonymous cell phone presented him with a difficult predicament.

With Dong-sik proving uncooperative, the police turned their attention to Yoo Jae-i’s butcher shop. Meanwhile, Ju-won made a startling announcement to the public.

A brawl erupted when Dong-sik intervened to protect Kang Jin-muk from exploitation. Meanwhile, Oh Ji-hun was pressed for answers regarding the night of the vanishing.

Ju-won concedes to Jin-muk’s proposition, agreeing to pursue his own independent inquiry. Meanwhile, Do Hae-won resolves to bring the matter to a close, determined to safeguard her son.

Park Jeong-je acts with integrity. The subsequent message from Min-jeong directs Dong-sik toward someone who has discerned the truth.

The town reeled at the news of the killer’s capture. He remained stubbornly silent, communicating only with Dong-sik and Ju-won. Their questioning proved deeply unsettling.

Driven by a whisper gleaned from a forgotten video, Dong-sik embarks on a desperate search for his sister’s remains. Meanwhile, Ju-won and Jae-i both return after a three-month absence.

Reviewing the CCTV footage, Dong-sik is certain he has identified the true perpetrator of the murder. Meanwhile, Ju-won discreetly attaches a GPS tracker to Nam Sang-bae.

Driven by the need to solve the newest murder, the team unites, their focus narrowed to two colleagues who now stand as potential suspects.

The circumstances surrounding Lee Yu-yeon’s death slowly yield their secrets. Jeong-je wrestles with fragmented recollections, struggling to piece together the events of that night.

The detectives, piecing together the fragmented evidence, began to reveal the extent of Han Ki-hwan’s involvement. Meanwhile, Dong-sik turned to Ju-won, seeking reassurance that he could rely on him.

Dong-sik overheard a conversation that stirred up a wealth of buried secrets. Driven by a resolute purpose, Ju-won resolved to delve deeper and unearth further truths.

The extraordinary audio recording solidified Ju-won's resolve: he would pursue justice relentlessly. Together with Dong-sik, he questioned Lee Chang-jin.

Following yet another inexplicable murder, Dong-sik aligns himself with Ju-won, determined to expose the culpable and ensure justice is served.