What 2010 South Korean psychological thriller, directed by Im Sang-soo, depicts a young woman who becomes entangled in the destructive affairs of a wealthy, dysfunctional family after becoming their housemaid?

The 2010 South Korean psychological thriller you're thinking of is "The Housemaid (Review)," directed by Im Sang-soo. This critically acclaimed film plunges viewers into the opulent yet unsettling world of a wealthy, dysfunctional family through the eyes of Eun-yi, a young woman hired as their new housemaid. Her arrival disrupts the seemingly perfect facade of the household, as she soon becomes entangled in a clandestine affair with the patriarch. This illicit relationship ignites a chain of events that exposes the dark undercurrents of desire, betrayal, and class struggle within the mansion.

The film is a remake of Kim Ki-young's iconic 1960 South Korean classic of the same name, but Im Sang-soo's version updates the narrative for a contemporary audience. While the original explored class tensions in a burgeoning middle-class society, the 2010 remake intensifies this by setting the story within the extreme upper echelons of modern South Korean society, highlighting the vast divide between the rich and the working class. The director uses stunning cinematography and a meticulously crafted atmosphere to underscore the psychological torment and moral decay that unfold.

"The Housemaid" garnered international attention, competing for the prestigious Palme d'Or at the 2010 Cannes Film Festival. Starring Jeon Do-yeon as Eun-yi, the film delves deep into themes of power, seduction, and the vulnerability of individuals caught in exploitative relationships. It serves as a compelling and often disturbing commentary on societal hierarchies and the destructive consequences when boundaries are blurred within a household where wealth dictates morality.