Consisting of sixteen chapters distributed over 16 episodes, this legal drama-fantasy television series centers on the lives on three young adults—a field reporter, a prosecutor, and a police officer—who have acquired the ability to foresee future events through their dreams, after saving each other many years ago.

While working with her mother Yoon Moon-sun (Hwang Young-hee) in their samgyeopsal restaurant, Hong-joo meets a chain smoker whom she dreamed of and was destined to die at a gasoline station.

On his first day at the Division 3 Prosecutors' Office, Jae-chan meets Lawyer Lee Yoo-beom whom he secretly loathes because of a bitter incident dating back to when he was a teenager.

When she wakes up from a coma, months later, Hong-joo is wrongly accused of the accident, and learns that her mother died of exhaustion working to pay the damages claimed by the victim's family.

The police and the media see what seemed like footprints on Geum-sook's undergarments while So-yoon's father Park Jun-mo (Um Hyo-sup) tries to cover it and insists that he did not do it.

Jun-mo arrogantly rejects her offer, but just before he starts beating her up, Hong-joo sets off a false alarm, prompting all the occupants to exit the building.

Meanwhile, Hong-joo has long been discomfited by one recurring dream, which shows herself wearing a blue jacket-like field reporter's uniform and lying apparently dead on a grassy terrain during a rainy night.

On the other hand, the Division 3 Prosecutors' Office (including Inspector Choi) investigates a car accident case involving Cho-hee's older brothers.

The murder case was reopened and with Jae-chan taking over it, he gathers all evidences of the crime, which also points Dae-hee as the culprit of the serial cat poisoning.

With the public enraged by Soo-kyung's sudden death, Jae-chan investigates the crime at once and cross-examines Woo-tak to find out more about the suspect Do Hak-young's past.

He gradually thinks that Hak-young is actually innocent, though he is still clueless about the geometrical figure on the floor which was impossible for a person to create within a short period of time.

When the criticisms seemed to be out of hand, Hong-joo opens a link in one of the comments for an anti-Jae-chan article (유수경 살인 사건 현장에 핏자국을 보니까 떠오르는 사진; Yusugyeong sarin sageon hyeonjange pitjagugeul bonikka tteo-oreuneun sajin; English: The bloodstains at the scene of Yoo Soo-kyung's murder case reminds me of a photo), leading to a picture of a robot vacuum cleaner running over a dog's excrement creating a geometric pattern on the floor similar to the blood pattern in Yoo Soo-kyung's case.

At the same time, Soo-kyung's housekeeper, whom Jae-chan was interrogating as a witness, also mentions of a robot vacuum cleaner which, according to Inspector Choi, was not found among the items inside the victim's residence.

To prove their hypothesis, Jae-chan traced the item with Inspector Choi and found it in an e-waste disposal facility with the help of Hong-joo (with co-worker Bong Du-hyun) and Woo-tak (with fellow policeman Oh Kyung-han).

Meanwhile, Lawyer Yoo-beom receives a call from a new client, professor-novelist Moon Tae-min (Ryu Tae-ho [ko]) who has recently finished his launch party for his new book.

With the crime finished, Professor Moon becomes apprehensive when he notices a child's cap lying nearby on the floor, implying that someone saw him killing his teaching assistant.

In Hong-joo's dream, Jae-chan conducts an autopsy and successfully prosecutes Professor Moon, but the seven patients waiting for the transplant perish in return.

Recently, Myung Yi-suk, who was subsequently convicted and punished with a life sentence, committed suicide inside his prison cell and left a note saying that he was falsely accused of the crime.

For the night shift, she covered Jae-chan who was interrogating a cellphone thief whose paralytic nine-year-old daughter died when he was in jail a decade ago.

On the other hand, Yoo-beom began receiving ominous text messages from an unknown source, asking him if he really manipulated the evidences for the IV drip serial killing case.

Just as the prosecution and Hong-joo's reporting team found out that it was actually a woman who owned the phone and bought the gasoline used for the arson, the secret texter and the real culprit of the serial killing, Ha Joo-an (Lee Na-ra), revealed herself to Yoo-beom.

Even though she knew it was extremely evil, she injected her first 11 victims with fatal amounts of Vecaron and, after Myung Yi-suk's arrest, killed in the same manner the remaining eight.

When Jae-chan seeks to be reconciled with him, the former policeman quits from his job as an inspector after days of tolerating the suspicions and rumors about him manipulating the evidences in the IV drip killing case.

At the hospital, Yoo-beom wakes up and tells the police detectives his fake story, but he suddenly felt nervous upon learning that Hong-joo also recovered, thanks to Jae-chan's early response.

Later, Hong-joo is discharged and is placed under witness protection, while the prosecution prepares for the lawsuit against Yoo-beom, who will be defended by his boss, Lawyer Ko Sung-ho (Son Byong-ho).

As the lawsuit verges to its opening, Woo-tak gets anxious after dreaming the fates of the three witnesses to be summoned to court: Inspector Choi telling his part in the investigation of the IV drip killing case, Hong-joo's statements getting impeached, and finally his own long-hidden secret going to be exposed.

As what Woo-tak had dreamt, Inspector Choi admits that he is part of the inspection of the seized items related to the IV drip serial killing case.

By describing the shape of the umbrellas and using Yoo-beom's green necktie and the red lace on Jae-chan's robe as color references, he is able to convince the judges and establish his credibility.

Jae-chan expresses his respect and thanks to him, apologizing to him for not being able to recognize him when they first met at the prosecution office, for compelling him to work too hard on investigations, and for making him worry when he acted foolishly.

Together with Hong-joo, Jae-chan, and their friends and colleagues, she attends the wedding party of senior prosecutors Ji-kwang and Son Woo-joo, who had been dating, unknown to their co-workers in the prosecution office.