Who are You? is a South Korean television series that aired in 2013. It is a supernatural drama that follows the story of a detective who can see ghosts and helps them solve their unresolved issues. The series has a total of 16 episodes that were broadcasted on tvN, a cable TV network in South Korea.

The series stars So Yi-hyun as Yang Shi-on, a detective who has the ability to see ghosts. She is partnered with a detective named Cha Gun-woo, played by Ok Taec-yeon, who does not believe in ghosts. However, as they solve cases together, he begins to accept the existence of the supernatural world.

The series begins with Shi-on being involved in a car accident that leaves her in a coma for six years. When she wakes up, she discovers that she can see ghosts. She is initially scared and confused by her new ability, but soon realizes that she can use it to help others. Shi-on becomes a detective and partners with Gun-woo to solve cases that involve ghosts. Their cases range from murder mysteries to helping ghosts find closure.

One of the main themes of the series is the idea of unfinished business. The ghosts that Shi-on encounters have all died with unresolved issues that prevent them from moving on to the afterlife. Shi-on helps them solve these issues so they can finally rest in peace. The series explores the different reasons why ghosts may have unresolved issues, such as revenge, love, and guilt.

Another theme of the series is the idea of acceptance. Gun-woo initially does not believe in ghosts and is skeptical of Shi-on's ability. However, as they solve cases together, he begins to accept the existence of the supernatural world. The series also explores the idea of accepting oneself, as Shi-on struggles with her ability and her feelings for Gun-woo.

The series has a strong focus on character development. Shi-on is a complex character who is dealing with trauma from her accident and her new ability. She is also struggling with her feelings for Gun-woo and her fear of rejection. Gun-woo is a character who initially seems one-dimensional, but as the series progresses, he becomes more complex and begins to understand the supernatural world.

The series also features a strong supporting cast, including Kim Jae-wook as the mysterious ghost-seeing doctor, Lee Eung-kyung as Shi-on's mentor, and Kim Chang-wan as Gun-woo's boss. Each character has their own story arc and adds depth to the series.

The cinematography of the series is stunning, with beautiful shots of the city and haunting scenes of ghostly apparitions. The special effects used to create the ghosts are also impressive and add to the eerie atmosphere of the series.

One of the standout episodes of the series is episode 9, which features a ghost who was a soldier during the Korean War. The episode explores the trauma of war and the idea of sacrifice. It is a poignant and emotional episode that showcases the series' ability to tackle difficult themes.

Who are You? is a unique and engaging series that blends supernatural elements with crime-solving. It is a well-written and well-acted series that explores complex themes and characters. The series is also notable for its diverse cast, with actors of different ages and backgrounds.

The series has been praised for its representation of mental health issues. Shi-on's trauma and her struggle with her ability are portrayed realistically and sensitively. The series also explores the idea of therapy and seeking help for mental health issues.

Who are You? is a must-watch series for fans of supernatural dramas and crime-solving shows. It is a well-crafted and well-executed series with strong themes and characters. The series tackles difficult issues with sensitivity and provides a unique perspective on the supernatural world. It is a series that will leave an impression on viewers long after the final episode.