"Parallel Worlds" is a fantastic series about the relationship between a doctor and the hero of a famous comic book about revenge, whose fates end up between two dimensions. The father of Oh Yeon-joo, the author of a popular story about a former athlete, mysteriously disappears right before the release of the final chapter. During her search, she is unexpectedly drawn into the drawn universe. There, she accidentally saves the central character named Kang Chul from certain death.