W – Du gaeui segye - Season 1 Episode 1

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?