Minjae is a highschool teacher during the day, but at dusk, he goes out on the streets and join with youth who are alienated from school and home. Due to an incident, Minjae is put to the test again to protect his students ─ Jigeun and classmates.
Lee Eun-saem was born on October 10, 1999 and is currently 23 years old.
Yoon Chan-young was born on April 25, 2001 and is currently 22 years old.
Son Sang-yeon was born on April 2, 2002 and is currently 21 years old.