Too many infant boys of Palm Beach gentry are dying of sudden infant death syndrome (SIDS). Only obstetrics nurse Casey Jansson is suspicious.

Al Warner, crack Miami homicide detective, is inactive, languishing on medical leave from a deadly shootout with the Angel of Death. He’s in the best physical condition of his life, but struggling to convince the department’s shrink he is not suffering from PTSD. 

Warner meets Casey at a local pub. They are attracted to each other, but misreading the other’s body language, remain reserved. Learning of the SIDS deaths from Casey, Warner concedes it sounds more than coincidental, agreeing to help investigate and hoping romance develops later.

Then Danny O’Brien, a resident doctor and Casey’s best friend, whose research on the deaths is coming to a stunning conclusion, is killed when his little Honda is pushed into the path of a speeding tractor-trailer.

Casey is shattered, but stubbornly continues her search for a culprit for these SIDS deaths. She receives Danny’s notes, mailed to her just before his death. Eager to investigate, she leaves Warner a message, and then follows her suspect deep into the Everglades. Getting Casey’s message, Warner races after her, sure that she put herself in danger. But unlike Casey, who had an unwitting guide, he is uncertain where to look. Casey’s obsession tangles her up in mortal danger. Only Warner can save her - if he can figure out where she went, and get there in time.