Just three days out from their wedding day, Jess and Max are ready to call it quits from the out-of-control planning. They visit Billie, the owner of a wedding donation company, specializing in donating leftover wedding elements to those in need. However when Max’s brother Charlie will stop at nothing to keep them together, he enlists the help of Billie to ensure this meant-to-be couple gets hitched once and for all.

Seventeen-year-old Cassie has become a recluse ever since her mother died in a horrible car accident. In an effort to fill the void, she downloads the latest intelligent personal assistant A.M.I., which is also the first to have a real consciousness. Their relationship quickly deepens into a twisted co-dependency and Cassie falls deeper and deeper under A.M.I.'s spell; driving her to perform what Cassie perceives as justifiable murderous acts. But what are A.M.I.'s true intentions? Soon Cassie begins to realize A.M.I. has something sinister planned.