6. Thirst (2009)
Park Chan-wook is often at his best when he tackles more fantastical stories, and Thirst is no exception. His frequent collaborator Song Kang-ho plays a priest who transforms into a vampire after sacrificing himself for a medical experiment to find a cure for a deadly disease. He becomes caught between his moral values and his killer instinct, especially after he falls for an unhappily married woman. The conflict between his saintly and devilish sides is thrilling to watch in scenes with dark comedic twists, erotic encounters, and blood-soaked violence.
