In April 2010, the Quintanilla family travelled to their farmhouse in Sitges to investigate the 'Legend of the Girl of Garraf Woods', a local legend of a ghost haunting the nearby area. Using video cameras, teenagers Christian and July recorded their findings as they went along. Five days later, the whole family was found murdered. The local Police reported the existence of 37 hours of recorded evidence. Atrocious finally reveals the shocking true footage of those tragic five days.