- Released on October 30, 2021
A reclusive ex-cop reenters the game as an insurance investigator, searching for clues in crime scenes perfectly staged by a serial killer in her midst.
Full Cast of Inspector Koo
Lee Hong-nae
as An Geon-uk
Lee Hong-nae was born on January 28, 1990 and is currently 34 years old.
Kim Hye-jun
as Song Yi-kyung / "K"
Kim Hye-jun was born on May 8, 1995 and is currently 29 years old.