Queen of Mystery

Seol Ok, who dreams of becoming a detective, has become a mentor for a new police chief, but must hide it from her nosy mother-in-law, who believes she’s having an affair.

Detective Ha Wan Seung’s arrest of gang boss Jang Do Jang backfires when a lawyer brings his methods into question. Seol Ok's startling experience doesn't stop her investigating.

Seol Ok insists that a robbery case is actually a murder. Detective Ha, however reluctantly, is convinced to let her help him.

Seol Ok believes the murderer is still at large, despite a confession given to the police, and makes a deal with Detective Ha.

Midnight is quickly approaching, but Seol Ok is determined to catch the culprit in time, despite Detective Ha's doubts.

The Violent Crime Unit is transferred to Robbery-Homicide, but Detective Ha refuses to stop going after Jang Do Jang. Seol Ok tackles a mystery in her house instead of on the streets.

Detective Ha, pursued by his fiancée-to-be, helps Seol Ok track down her sister-in-law so she will be willing to testify against Jang Do Jang.

As Seol Ok continues to trail Noh Doo Gil, she becomes separated from Detective Ha. Jung Ji Won makes a surprising request.

Detective Ha is about to be reinstated at Seodong, but worries that Seol Ok’s testimony will put her in danger. Ho Chul orders Jang Do Jang be released again.

Detective Ha and his team are excited to be part of a special unit, but realize their expectations were too high. Seol Ok is spurred into action by Joo Hyun’s death.

After Seol Ok disagrees with Inspector Woo about Joo Hyun’s case, she starts to investigate with Detective Ha and his colleagues.

Seol Ok and Detective Ha clash with Inspector Woo and his team when everyone goes after the Tape Serial Murderer.

Seol Ok is excited to celebrate her wedding anniversary, but finds out that a case she turns down involves her mother-in-law. Jung Sang Won goes behind his sister’s back to CEO Ha.

Ji Won gives Detective Ha evidence of Hyun Soo’s death, but he refuses to believe it. Seol Ok’s marriage continues to implode.

Seol Ok and Detective Ha start to unravel the connection between their loved ones’ deaths, but have to find Jang Do Jang’s real murderer first.

Detective Ha believes he’s found out what really happened to Hyun Soo, but cannot go after the perpetuators by himself.