S1 • E1
Oh Sung Moo writes the most popular webtoon series known as "W," disappears on the day before he is supposed to finish the final episode of the webtoon. When Oh Yeon Joo a second-year cardiothoracic resident doctor, goes into her father's drawing room to investigate, an unexplained thing happens. A bloodied hand appears out of a tablet screen and pulls Yeon Joo onto a rooftop where Kang Cheol is bleeding from a stab wound. Yeon Joo ends up saving Kang Cheol's life, only to realize after the incident that Cheol is the main character of her father's webtoon. The next day, Sung Moo just as mysteriously returns and is intent on writing the final episode of the webtoon and once again tries to kill off Kang Cheol. But when Yeon Joo tries to talk her father out of ending the series, she finds herself sucked back into the world of Kang Cheol, his secretary Yon So Hee and bodyguard Seo Do Yoon. Then everything that happens to Yeon Joo in Kang Cheol's world is automatically drawn as the next episode of her father's webtoon. Why is Yeon Joo becoming embroiled in the fictional life of Kang Cheol and who is writing the story?
S1 • E2
Sung Moo, who has disappeared for a while, is back. Yeon Joo tries to figure out what has happened to her last night, but Sung Moo doesn't tell her anything. Meanwhile, Sung Moo starts drawing again to kill Kang Chul.
S1 • E3
Soo Bong starts to believe what Yeon Joo says about getting dragged into the world of W. Yeon Joo gets dragged into the graphic novel once again, and Kang Chul takes her to his place. He starts to ask questions about her.
S1 • E4
Kang Chul tells Hyun Seok that Yeon Joo is the only one who can reveal the secrets of his life. Meanwhile,Yeon Joo gets arrested because of So Hee. Kang Chul visits Yeon Joo in prison.
S1 • E5
Yeon Joo's professor urgently calls Yeon Joo and asks her to get a spoiler about a popular graphic novel series, W, from her father. He promises that he will give her the opportunity to perform a surgery if she does
S1 • E6
Yeon Joo hurriedly heads to Sung Moo's workroom, but Sung Moo has already been shot by Kang Chul. Kang Chul leaves his last letter to Yeon Joo, and heads to the Han River Bridge to make a proper ending for himself.
S1 • E7
Kang Chul wakes up from sleep as if nothing has happened. Yeon Joo gets arrested in Kang Chul's world. Yeon Joo tells Kang Chul that they should create a new sequel on their own. Kang Chul decides to give up on catching the real culprit.
S1 • E8
Yeon Joo bleeds in Kang Chul's world, and Chul is worried that she could die. The real culprit is out in the real world and finds Yeon Joo. To fix everything, Kang Chul asks Yeon Joo to draw something.
S1 • E9
Yeon Joo gets dragged into the story again, but Kang Chul doesn't recognize her anymore. In order to make a logical happy ending, Sung Moo draws the real culprit's face.
S1 • E10
Yeon Joo is stuck in the world of W, and Kang Chul is bothered by the way Yeon Joo looks at him. Chul Ho gets in trouble with the appearance of the real culprit.
S1 • E11
Yeon Joo comes back to the real world and discovers that Sung Moo has lost his face. She finds out that the story was being drawn by the real culprit. Yeon Joo takes Sung Moo's tablet and starts drawing again to save Kang Chul.
S1 • E12
As soon as Kang Chul realizes once again that he is the character in a graphic novel, a gate to the real world appears. Kang Chul talks with the real culprit in Sung Moo's workshop. The real culprit says that Chul will soon cease to exist
S1 • E13
A funeral service for Kang Chul is held in the world of W. Kang Chul and Yeon Joo dream of having a happy and ordinary life of a couple in the real world. However, another variable appears and the real culprit escapes and kidnaps Yeon Joo.
S1 • E14
Sung Moo gets his face back. He remembers the real culprit's memories and looks for Yeon Joo, but he soon finds out that Yeon Joo is dead. Meanwhile, Kang Chul falls into Han Chul Ho's trap while trying to look for the tablet.
S1 • E15
Yeon Joo is back in the world of W, and she meets Kang Chul at the courthouse. Meanwhile, Han Chul Ho kidnaps Doh Yoon in order to get a hold of Kang Chul. Yeon Joo and Kang Chul try to decide on the ending of the story.
S1 • E16
Yeon Joo and Kang Chul escape from their safe house after getting surrounded by the police. Kang Chul goes to Han Chul Ho in order to rescue Doh Yoon. Han Chul Ho now knows about the world of W. Will Chul be able to have a happy ending?
S1 • E17
Oh Yeon-joo
Kang Cheol
Seo Do-yoon
Oh Sung-moo
Park Soo-bong
Han Chul-ho
Olympics Cameraman
Yun-hee
Cameo