Starring up incoming actors Karen Gillan (appearing this summer in Guardians of The Galaxy) and Brenton Thwaits (appearing in this summer's "Maleficent"), Oculus tells the disturbing tale of two siblings going face-to-face with a supposedly haunted mirror that haunted them as children. After the brother Tim (Thwaits) is released from a mental institution, his arguably more unstable sister Kaylie (Gillan) recruits him to take part in an experiment to prove that an antique mirror is responsible for the death of their mother when they were kids.