강용석의 고소한 19

A funeral director meets a man who has been battling Lou Gehrig's disease since he was young. The two fall in love and hope for a cure that can keep him alive.

Hyo-min, who became a prostitute by choice, undergoes sex training to serve clients under the supervision of Kyeong-seop, the manager of the establishment. She services countless men and even learns advanced techniques directly from Kyeong-mi, who works with her. Meanwhile, Kyeong-seop gradually opens his heart as he discovers the reason behind Hyo-min's decision to enter prostitution.

Before a wall of flickering monitors, a hidden observer watches secret footage from women’s private rooms. His silent surveillance turns ominous as cryptic words suggest a looming plan to expose — or exploit — the lives he has invaded.