New school headmaster and single mother Kathy discovers her vacation fling with charming 18-year-old Ian was no accident when he transfers to her school targeting Kathy and her teenage daughter Bree in a deadly scheme       Ian wants revenge as he believes Kathy is responsible for splitting up his family ultimately leading to his father's death       Kathy will need to uncover Ian's motives quickly if she hopes to protect herself and Bree from his dangerous threats