Captain Choi Young Jin's dedication to her police work makes her one of the best cops around, but that doesn't mean she has stability in either her work, or her family life.

Young Jin quits the police force, but can't seem to pull herself away from the dangerous Nam Sang Hyuk case.

Two years after the Nam Sang Hyuk case, Young Jin is working a lower level job, but a new murder case has her back on the scene.

Young Jin digs to find the truth behind Mi Kyung's murder, even when a false confession has everyone else convinced.

Young Jin is back in Violent Crimes and picks out her new team, who quickly get to work on a sex trafficking case.

The Violent Crimes Divison digs deeper into the Lee Eun Jung murder case, but can't agree on their main suspect.

Do Young has trouble relating to both her senior, Jin Woo, and the rebellious Eun Young, who holds the answer to the location of the missing girls.

Young Jin declares the recent murders to be the work of a serial killer, and her team is on a time limit to catch him before he strikes again.

The team must discover the pattern in the serial killings, but any chance of a hint from Chairman Kang remains dim.

Vacation is over and the team is launched into a vehicle theft and export case. Park Dong Il prepares to carry out his revenge against Chairman Kang.

The team must track down the man behind the illegal auto sales, but they don’t know what he looks like, his real name, or what's really going on at the heart of the case.

Both Young Jin and Chairman Kang wait anxiously for Park Dong Il to wake up, or die, and either reveal the truth behind Young Jin's father's death or keep it hidden forever.

Now that she knows the truth, Young Jin doesn't want to let Chairman Kang get away with her father's murder. Kang Jae Won escapes the hospital for a night out that quickly turns dangerous.

After a deadly confrontation, Chairman Kang will do anything to get revenge on Young Jin, and Young Jin wants more than ever to land Chairman Kang in prison.

Young Jin is framed for bribery and her job is at risk again. Jong Ho stumbles upon a dark secret about Chief Yeom.

The team must get to the bottom of the deadly Future City fire. Chief Yeom finds himself in over his head.

With KL's slush fund log in hand, Young Jin's team begins closing in on Chairman Kang, and on everyone who's been doing his dirty work.

Chairman Kang has all of Korea convinced of his death, but Young Jin isn't buying it, and goes after him with all she's got in the final episode.