Dr. Anna McIntyre's life was going along just fine until someone else started living it. Her patient dies because of an identity mix-up, her medical career is in jeopardy because of forged prescriptions, and her credit is in ruins. Her determination to clear her name might be a prescription for trouble.

Dr. Sara Miles's teenage patient is on the brink of death from a highly resistant infection with Staph luciferus, known as "the killer." Only an experimental antibiotic developed and administered by Sara's ex-husband can save her. But the drug's potentially lethal effects send Sara and colleague 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...