What happens when the race to stop a lethal bacteria becomes a race to stop a killer? Dr. Sara Miles' teenage patient is on the brink of death from an overwhelming, highly resistant infection with Staph luciferus, known to doctors as "the killer". Only an experimental antibiotic, developed and administered by Sara's ex-husband, can save the girl's life. But potentially lethal effects from the drug send Sara and her colleague, Dr. Rip Pearson, on a hunt for hidden critical data that will let them reverse the effects before it's too late. What is the missing puzzle piece? And who is hiding it?