An unsettling psychological thriller about a man - Lee Jong-su, who meets an old childhood friend - Shin Hae-mi, who persuades him to housesit her cat while she's on vacation. And when she returns from vacation she brings a new friend - Ben, whom she met while stranded 3 days at an airport.
From here, events build. An unlikely protagonist, an unsettled plot, another brilliant film that simply wouldn't be made in Hollywood.
Five Stars for those looking for a little more challenging films.