When Kim Hye-ja's nameless mother of the title discovers her son, who has learning difficulties, has been arrested for the murder of a girl, she sets out to find the real killer and prove his innocence. Already released to huge critical acclaim in the US, Korean director Joon-ho Bong's Hitchcockian style thriller won Best Film, Best Script and Best Actress at the Asian film Awards and was a serious contender for this year’s Palme D’Or at Cannes Film Festival.