W: Two Worlds (2016)

Oh Yeon-joo is a cardiothoracic resident whose father is a famous webtoon creator. When her father mysteriously vanishes during the writing of the final chapter of his hit webtoon "W", Yeon-joo visits his studio to investigate. There, she is pulled through his drawing tablet directly into the webtoon's world, where she saves the life of the story's main protagonist, Kang Chul. Entangled in a murder mystery, she must navigate the boundary between reality and the virtual world, as the comic book's hero begins to question his own existence.