Midnight Runner

Ki-joon and Hee-yeol, best friends and students at the Korean National Police University, witness the kidnapping of a young girl one night in Gangnam. They promptly report the crime to the Gangnam police station. The incident spurs them to take action even as students.

The Missing Persons Unit prioritizes a high-profile kidnapping, leaving their case on the back burner. Ki-joon and Hee-yeol realize time is slipping away in the critical hours after the kidnapping. They decide to pursue the case on their own.

Through their amateur investigation, they track the kidnappers to a location connected to an unfertilized egg harvesting ring. They discover that many girls are being held captive in a hidden hideout. They prepare to intervene.

Ki-joon and Hee-yeol attempt to rescue the captives but are beaten and imprisoned by the kidnappers. They endure harsh treatment before managing a desperate escape.

After escaping, they return to the hideout only to find it empty and the trail cold. They regroup and reassess their next move.

Professor Yang Sung-il warns them that continuing the pursuit could lead to expulsion from the university. The warning doesn't deter them as they recognize the urgency of the case.

Unable to wait, they resume their investigation using CCTV footage to track a van to a fertility clinic. They uncover a link to the kidnapping ring and decide to act.

They undergo intense physical training and borrow armor equipment from the university to prepare for the raid. Their commitment pushes them beyond typical student limits. They vow to intervene despite the risk of expulsion.

Ki-joon and Hee-yeol infiltrate the fertility clinic, subdue all enforcers, and confront their boss Yang-choon. They succeed in overpowering the guards and securing the victims.

They contact the police to arrest the kidnappers, choosing to formalize the rescue despite the possible expulsion. The action marks a turning point where moral justice overrides university rules.

Back at the university, some disciplinary board members argue they did the right thing morally. Ki-joon and Hee-yeol are instead held back a year and sentenced to 500 hours of community service.

While completing their community service, Yun-Jung visits Ki-joon and Hee-yeol to thank them for rescuing her. The gesture reaffirms the impact of their actions.