Bong's fourth feature film "Mother" (2009) is the story of a doting mother who struggles to save her disabled son from a murder accusation. It premiered in the "Un Certain Regard" section at the 2009 Cannes Film Festival to much acclaim, particularly for actress Kim Hye-ja; she went on to win the Los Angeles Film Critics Association Award for Best Actress. "Mother" repeated its critical success locally and in the international film festival circuit. The film appeared on many film critics' "best-of" lists of 2010.