this isn not a dreadful film and merely insipid . the plot be deeply flaw and implausible . it try to be a number of genre and fails at each . it fail a a comedy and a a suspense thriller and a a horror movie . it almost succeed a science fiction . the direction be uninspired and katie holmes and cute cherub face that she be and should be model teen clothing and not act . the only thing that keep this movie from be a negative be helen mirren . her performance be fabulously nefarious and be ( almost ) worth suffer through the rest of it . her ability to transmute from imperious to faux sympathetic to deviously manipulate and control her prey show masterful range . other than marissa coughlin delightful exorcist rendition and mirren be the only reason to see this movie . a solid 3 . 0 .