This film, does raise an interesting question, about identity, relationships and trust. It does refer to Luis Bonuel's Movie That Descret Object of Desire. But at the bottom line it doesn't say anything new. Anything worth seeing the movie for. In fact after raising the question, Sang-Soo Hong, the film's director seems to have run out of steam and the ending is simply patched up and forced. As if he couldn't really solve the riddle he laid in his movie, so he settled for the first lame idea he could come up with.
It's well acted and professionally directed, but the ending is leaving the whole experience with a bad after taste of a half baked cake.