Koo Kyung-yi was once a brilliant police officer, but now she's a reclusive insurance investigator who prefers video games to real life. Her world is turned upside down when a series of "accidental" deaths seem too perfectly planned to be coincidences. Pulled back into the field, Koo uses her sharp instincts to hunt for the truth.
She soon finds herself in a thrilling cat-and-mouse game with the mastermind, a deceptively innocent college student known only as "K." The show is a unique dark comedy and crime thriller, following the messy but brilliant detective as she tries to outsmart a cunning and psychopathic killer. This stylish and suspenseful series has ended, but sign up for a reminder just in case it returns.