Thirst is a 2009 horror film written, produced and directed by Park Chan-wook. Based on the 1867 novel Thérèse Raquin by Émile Zola, the film stars Song Kang-ho as Sang-hyun, a Catholic priest who turns into a vampire as a result of a failed medical experiment, and falls in love with Tae-ju, the wife of his childhood friend.

Park Chan-wook is a South Korean film director, screenwriter, producer, and former film critic. He is considered one of the most prominent filmmakers of South Korean cinema as well as 21st-century world cinema. His films, which often blend crime, mystery and thriller with other genres, and have gained notoriety for their cinematography, framing, black humor and often brutal subject matters.