Major Charles Forsythe is a highly decorated US Army officer—and a dangerous control freak. After a brutal outburst of violence, he destroys not only his marriage but also the life of his pregnant wife, Sarah. Sarah survives and escapes. With unwavering determination, she begins training to reclaim her freedom. As she prepares for the Rome Marathon, Forsythe spirals into a pathological obsession. The race becomes a deadly confrontation between perpetrator and victim.