Heeseung is a police while you are a teacher to a school, he's the most famous Police in the city, everyone praises him, he has no wife or gf yet tho....

One day, a kidnapper got into the school and started scaring the teachers(including you) to kidnap kids....the police took your co-teachers away from the building, you were also running but suddenly the building grew fire while you are left inside...suffocating