A Bittersweet Life
"When doing right goes very, very wrong."
Kim Sun-woo is an enforcer and manager for a hotel owned by a cold, calculative crime boss, Kang who assigns Sun-Woo to a simple errand while he is away on a business trip; to shadow his young mistress, Heesoo, for fear that she may be cheating on him with a younger man with the mandate that he must kill them both if he discovers their affair.
Directors: Kim Jee-woon
Writers: Dong-Cheol Kim, Kim Jee-woon
Cast
Homepage: http://www.d-o-e-s.com/collection/bittersweet/index0.html
IMDB: tt0456912