Reporter Heather McKinley, is thrilled to discover she’s finally pregnant, even though she’s divorcing her husband. After finding an injured dog beside the road, she takes him to the town vet. There she meets the vet’s interesting brother, brilliant CDC researcher, Daniel Whistler.

Daniel wants Heather, but he also wants to stop the spread of the mysterious virus that makes men and women infertile and even kills some people. He persuades her to travel to Atlanta with him and visit his CDC office, but he feels his actions in the past made him unworthy of her.

After Heather and her sister have miscarriages, Heather joins Daniel in a search for the cause of the plague and the man who set it in motion. They follow outbreaks of the disease in Atlanta, Dallas, New Orleans, and even on a Caribbean cruise ship, but can’t seem to catch the perpetrator. Then Heather disappears on the cruise ship.