A woman tries to exonerate her brother, who was convicted of murder, by proving that the crime was committed by a supernatural phenomenon.

Oculus is a spine-chilling supernatural tale of two damaged siblings (Karen Gillan and Brenton Thwaites) who, as children, witnessed their parents' harrowing descent into madness and murder. At long last, brother and sister reunite as adults to expose and destroy the paranormal entity they believe is responsible: the Lasser Glass — a legendary mirror their family once owned.