When Detective Moo Jin Hyuk's wife is brutally murdered, Kang Kwon Joo, an officer with superior auditory abilities, listens on the other end of the 911 call. Three years later, Jin Hyuk and Kwon Joo find themselves working together.

Jin Hyuk rushes to get to Bok Rim before it's too late. Kwon Joo compiles officers with varying expertise for her Golden Time Team.

Time is running out for Ah Ram as Kwon Joo tries to decipher the xylophone sound. Kwon Joo tells Jin Hyuk her side of what happened three years ago.

When Go Dong Chul's death is ruled a suicide, Kwon Joo realizes she must take things into her own hands. Jin Hyuk hurries to find the victim, whom he knows personally, of a kidnapping case.

The clock is rapidly ticking for Kwon Joo as her captors prepare to bury her alive. Meanwhile, Eun Byul's own life is in danger as she's hidden in a location unknown to the police.

Kwon Joo realizes they may have written off Baek Jin Gu's claims too quickly. Later, she finds troubling information related to the Eunhyung-dong case.

As gas continues to leak from the bus, the chance of an explosion heightens. Jin Hyuk must face the undeniable truth about Dae Shik.

Jin Hyuk and Kwon Joo sneak into Tae Gu's killing lair, unaware Dae Shik is inside. Can they capture the crazed murderer before he escapes? Find out in the thrilling series finale.

Kyung Il reveals to Kwon Joo that he witnessed her father's murder. Jin Hyuk and Kwon Joo go off on their own, feeling closer than ever to finding the perpetrator.

When a dead body falls out of a supposed victim's closet, Jin Hyuk and Kwon Joo realize the case goes much deeper than they had initially expected.

Jin Hyuk tries to escape the clutches of Good Friend, who don't quite live up to their name. The hunt for the perpetrator continues, but he is not an easy target.

An accusatory post about Hyun Ho appears online. The Center receives multiple calls when a night club suddenly turns into a nightmare.

The elusive Nam Sang Tae prepares to flee the country, but the police are determined not to let him get away this time. A 911 call brings the Golden Time Team to a hostage situation on a rooftop.

Jin Hyuk goes to meet Nam Sang Tae by himself, hoping for answers. Kwon Joo looks deeper into the relationship between Ji Hye, Kong Chul Hwan, and GP Development.

All hell breaks loose when Kwon Joo recognizes Tae Gu's voice. A serious bus accident threatens the lives of many, including a pregnant woman and a child.

When a criminal mastermind goes after one of their own, the Golden Time Team's Kang Kwon Joo butts heads with other cops over the crime. Detective Do Kang Woo sees the parallels with a murder in his past.

A convicted child rapist is released from prison and strikes again, to the anguish of the victim's family. Detective Do chases an all-too-familiar suspect, but nothing remains in his grasp.

With the serial killer brazenly turning himself in, Director Kang can't help but think something's off. Bang Jae Soo explosively pushes Detective Do to face his past, but not everything can come out in the end.

In the aftermath of the crash, the mastermind runs free. Director Kang Kwon Joo aims to team up with Detective Do, but it'll be harder than she thought, and the case unfurls into something much darker.

With the life of Detective Park's wife on the line, the Golden Time Team chases after malicious voice phishers who attacked an old lady for her money.

The serial killer reveals himself to Detective Do and Director Kang, but it only makes him lash out even more as he goes to teach the Golden Time Team a lesson.

With Kwak Min Soo in the grasp of law enforcement, the situation is turned on its head when someone gets through their safe walls. An old man finds the suicide of his friend, but nothing is as it seems.

Yang Ho Shik ambushes Eun Soo while Jin Hyuk and Dae Shik are led astray. Things become even more personal when Dong Woo is put in danger.

The "zombie girl" makes her way into a nearby town, and the Golden Time Team does its best to get to her first. Director Kang is become unsure of Captain Do when she receives mysterious photos.

The Golden Time Team runs into twists at every turn in the case of Agent Park's abduction. Detective Do's blackouts make trouble for him again as he loses his grip on reality.