Cuddling an injured stray pup in the veterinarian’s office, ambitious reporter Heather McKinley meets his intriguing brother, brilliant CDC doctor, Daniel Whistler.
While visiting his brother, Daniel enjoys getting to know Heather and picnicking with her and her dog in Pleasant Prairie, Texas. He’d rather spend more time with Heather, but he soon gets called back to his office in Atlanta to investigate a new virus. Mutated from the Rift Valley Fever in Kenya, the more deadly virus not only sickens people, but causes sterility.
Despite being recently divorced, Heather is thrilled to discover she’s finally pregnant and hopes to carry the baby to term.
Delighted to visit Daniel in Atlanta, she becomes infected by a bioterrorist spreading the virus in the air. She is devastated by her miscarriage and determined to help Daniel hunt and stop whoever is dispersing the virus. She interviews patients at the hospital for her paper.
Following tips, she and Daniel travel to Dallas and New Orleans, and even board a Caribbean cruise ship in their search. Heather and Daniel enjoy being together on the cruise as their developing love for each other deepens, but each holds a secret threatening to tear them apart.