Sara Parkins, a hopeful actress, trying to land her first national commercial, meets Jason Forest, a handsome scientist, who recently moved into her building. She immediately falls for him. Shortly afterward, her best friend, Anna, dies of a heart attack and even the doctors are baffled. The next day another woman she meets, goes into cardiac arrest and dies. The victims of massive heart attacks, male and female, otherwise in perfect health, begin to pile up, and Sara suspects these individuals are being systematically killed, but she doesn’t know why or by whom. Sara asks for Jason’s help, but begins to suspect Jason is hiding something from her. After further research of her own, she makes a startling discovery that leaves her with a difficult decision on who to trust. Not being a woman to sit still, Sara seeks answers and stumbles onto a terrorist plot to kill millions and because of her questions, puts herself directly in harms way.