Hello Monster

Lee Hyun, a Criminologist working for the New York Police, returns to Korea to investigate a recent email that he received. He hopes to recover all of his early memories that he lost after the tragic murder of his father. On arrival at the airport, he deciphers some cryptographic symbology that …

Plagued by insidious thoughts planted by serial killer Lee Joon-Yeong and recent events; Lee Hyun's father believes that he is becoming a monster. He isolates him in the basement to protect both him and the world. Joon-Yeong escapes from prison, murders his father and absconds with his brother …

Team 1 working with Lee Hyun come up with a profile of the victims. Cha Ji-An races to the next suspected victim and is successful in capturing the murder suspect but complications arise as there is no proof and the target drops any charges. Attorney Jung Sun-ho arrived during the interrogation …

The murder suspect, Yang Seung-Hoon, leaves on the first available plane to China. Lee Hyun illegally uses Cha Ji-An’s computer and informs Chinese authorities of his drug trafficking. They find evidence at his house and arrest him on arrival. Team Leader Kang Eun-Hyuk and Planning Officer Hyun …

Cha Ji-An is going stir crazy wanting to investigate so she joins up with Lee Hyun. They evade capture by hiding in a closet at the crime scene. They start bonding while he hides out at her place, and she attends his wounds. He convinces her to spy for him. Together they are able to figure out …

Lee Hyun meets with Prosecutor Shin Jang-Ho concerning Park Young-Chul's case. Jang-Ho informs Lee Hyun has experienced two cases of memory loss in relationship to his parents' deaths. Also, that Lee Joon-Yeong never leaves any bodies to be found for his murder cases. In order to investigate the …

Lee Hyun confronts Cha Ji-An about her doubting him and thinking he may be like Lee Joon-Yeong. Lee Hyun believes Lee Jung-Ha is covering for Lee Jin-Woo. Teams 1 solves the Park Jeung-Woo murder case. After doing some soul searching, Cha Ji-An comes to the conclusion that she is wrong, and Lee …

Chi Ji-An is brutally attacked in her home and Attorney Jung comes to her rescue. Lee Hyun finds it suspicious and questions him if Yang Seung-Hoon is behind the attack. After her hospitalization, Lee Hyun decides to let her stay with him for a few days. Ji-An is awakened from her sleep to find …

The Planning Officer still refuses to open up to Lee Hyun concerning his past in regard to Joon-Young. Team 1 starts working on another serial killer case involving stalking and missing persons. Detective Son’s blind date, Ji Hyun-Sook, goes missing. Lee Hyun develops a profile with possible …

The serial killers, Do Jae-Shik and Kang Seong-Eun, capture Cha Ji-An and leave Team Leader Kang dying from a knife wound. Lee Hyun, Attorney Jung, and Pathologist Lee join Team 1 as they rush to apprehend the suspects. Planning Officer Hyun finally confesses about her deal with Joon-Yeong that …

Detective Jang’s missing notebook mysteriously appears at Lee Hyun’s home. Following the clues in the notebook, Ji-An and Lee Hyun arrive at the original home of Lee Joon-Yeong. They discover a casket with the bones of what may be Joon-Yeong’s mother. Park Joo-Ah, one of the family caregivers …

Team 1 arrest Joo Yeong-Jae’s mother for abuse as she was a witness to the beating and did not interfere. Na Bong-Sung provides Lee Hyun with enough evidence to support his theory that Attorney Jung is his brother Lee Min. Min catches Hyun at his home looking at his paintings. Hyun request Min not …

Jo Yong-Woo attacks Lee Min in order to make Lee Hyun suffer. Cha Ji-An arrives in time to prevent Yong-Woo from killing Min, but he manages to get away. Lee Hyun confronts the Planning Officer and Deputy Chief about their collusion with Lee Joon-Yeong. Ji-An has concluded that the Medical …

Reeling from the discovery of her father’s remains, Cha Ji-An wants revenge but has to settle for seeking justice. Lee Min decides to move in with Lee Hyun and Lee Joon-Yeong’s hopes for living together with the brothers is shattered. Planning Officer Hyun Ji-Soo is murdered, devastating the …

Lee Min catches Chai Ji-An ransacking Lee Jeong-Yeong’s special room but allows her to leave with some photos of children that he has taken under his wing. Joon-Yeong poses a question to Lee Hyun, “Would you be able to take care of him by yourself?” Kang Eun-Hyuk informs Ji-An of his father’s …

Lee Hyun remembers his past of killing the murderer of his mom and the meaning behind Lee Min’s cards. Cha Ji-An tells Lee Min to turn himself in because it is wrong to hurt other people and if he doesn’t, he and Hyun will never have a happy ending. Kang Eun-Hyuk interrupts Lee Joon-Yeong choking …