Mandy Leeds is a successful young woman: living in sunny Miami, she's on her way up the corporate ladder in the hotel industry. She doesn't get back to her small hometown much, but this year her Gram has finally convinced her to come home for Christmas. Mandy has another reason too: the quaint local inn is for sale, and she wants to acquire it for her company. With her eyes on the prize, Mandy travels back home but on her way there, she runs into none other than Lucas Menzino, her high school...

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...