Dr. Iris Ballard is eager to get away from the press that has been clamouring for interviews after Iris caught a cunning serial killer. But she won’t have any time to relax or reconnect with her sometime boyfriend ans ex FBI agent Luke, because she has to head home to Grey Mills, Pennsylvania to save her twin brother. Billy has dumped his fiance and cleaned out all their savings to join a cult called New Saturday Movement. Iris is sure she’s smarter than the cult’s leader, Mathias Morning, but she’s in for a surprise. Morning is no dummy and he’s ready for Iris. Soon, Iris is fighting for her life and the life of her brother. I love Iris Ballard, she’s a complicated, wildly imperfect heroine.