While You Were Sleeping

Jae Chan has a dream about Hong Joo. He feels that he must prevent the events of his dreams from actually happening and tries his best to make sure that the accident never happens.

Jae Chan finds out that Hong Joo has precognitive dreams on a regular basis and visits her after dreaming of his younger brother, Seung Won, becoming a murderer.

So Yoon tries to kill her father to protect her mother, and Seung Won tries to stop her and help her out.

Jae Chan and Hong Joo meet before the situation becomes irreversible. Before things get ugly, Jae Chan gets to Seung Won, and Hong Joo improvises so that things turn out differently from her dream.

Jae Chan tells Seung Won to stay out of trouble, but they only drift apart more.

Woo Tak has a precognitive dream that shows Hong Joo getting injured. He brings Jae Chan along to where it actually happens, so Jae Chan is able to prevent the injury from happening.

Woo Tak and Hong Joo have similar dreams, but they end in different conclusions. They call Jae Chan in order to lead to the result they hope for.

Hong Joo is torn between going back to work and helping her mother out at the restaurant.

As Jae Chan, Woo Tak and Hong Joo begin to alter the future by preventing the events from happening, Hong Joo gains hope that perhaps her fate isn't sealed.

Jae Chan has a precognitive dream that shows Hong Joo announcing false insurance case in the news.

To prevent the case, Jae Chan asks Hong Joo to remember the details of incident if anything happens, so that he can find her after seeing in his precognitive dream.

Jae Chan arrives to the scene of the crime to find out Woo Tak has been stabbed. He goes after Dae Hee and manages to arrest him. Jae Chan works hard to make sure that Dae Hee is prosecuted for his crimes.

Meanwhile, Woo Tak stays at Hong Joo's house while he recovers and asks both Hong Joo and Jae Chan for favors while he's there.

A murder case of Yoo Su Kyung,a former professional archer, occurs andDo Hak Youngis pointed as the prime suspect.

Hak Young is a friend of Woo Tak, so Woo Tak convinces Hak Young to turn himself in. Jae Chan has to prosecute Hak Young, but there’s not enough evidence to do so.

Hak Young is released and set to be investigated without detention. Thanks to a comment left by a netizen, Hong Joo figures out the cause of the strange markings on the floor of Yoo Su Kyung's apartment.

Meanwhile, Yu Beom uses the media to appeal to the public on Yoo Su Kyung's case.

Jae Chan gets shot by Yoo Su Kyung’s father, Yoo Man Ho, and gets transferred to a hospital.

Hong Joo receives a note that Jae Chan sent to her before the accident and realizes that they’ve known each other for over 13 years.

Jae Chan is released from the hospital and stays with Hong Joo for two days. Woo Tak and Hong Joo both dream about Jae Chan. In their dream, Jae Chan is in charge of a case that results in his resignation from the prosecution.

Upon his return to work, Jae Chan must decide whether or not he will authorize the autopsy for a man who is set to donate his organs.

Jae Chan charges Moon Tae Min for murder despite everyone’s disapproval. He has to prove that Lee Hwan didn’t die from the organ transplant, but Yu Beom has a strong argument that Jae Chan can’t win over.

Meanwhile, Moon Sun wants to keep Jae Chan away from Hong Joo because she doesn’t want to see Hong Joo suffer.

Woo Tak and Jae Chan share their theory behind why they can see each other's future in their dreams.

Hong Joo goes to Criminal Division Three to follow a prosecutor for three days for an article, and Jae Chan is worried that he will embarrass himself in front of her. Meanwhile, a cellphone thief provides evidence for a past case.

After the arson, Criminal Division Three is swamped with work.

Woo Joo and Hee Min look into the arson case, and Ji Gwang and Jae Chan reinvestigate the IV drip serial murder case. Hong Joo also begins to look into the case. Meanwhile, Yu Beom receives a mysterious text message from the real killer.

Hong Joo is injected with a lethal drug and loses consciousness.

Fortunately, Jae Chan comes just in time to save her. The court hearing begins and Hong Joo is summoned to testify.

Yu Beom is on trial for manipulating the murder of Ha Ju Won. Before the trial, Dam Dong suspects that Yu Beom will try to leave the country. He tells Jae Chan, who tells Woo Joo that they must a travel ban preventing Yu Beom from leaving.

Meanwhile, Woo Tak decides to take a huge risk in order to help this trial be successful.