"The Perfect Match" is a romantic thriller that follows the story of Lee Seung Gi, a detective investigating a series of murders in the city, and Han Hyo Joo, a young woman who creates an AI dating app that matches people based on their interests and personality traits. When Lee Seung Gi's character signs up for the app and is matched with Han Hyo Joo's character, they hit it off and begin to develop feelings for each other. However, they soon discover that the murder victims are connected to Han Hyo Joo's tech startup and the dating app is being used to target them. As they work together to catch the killer, they go on a dangerous and thrilling chase across the city, with their relationship deepening as they share the experience of danger and investigation.