She’s just started her first job as an anesthesiologist at Deaconess Hospital in San Francisco, she’s bought a new home, and she’s engaged to be married. Life is good for Hannah until one morning at work when tragedy strikes. A patient under her care dies unexpectedly during a routine operation. An investigation into the case reveals the cause of death to be an error committed by Hannah. Wracked with guilt, she falls into a malaise of depression and self-reproach. Yet the more she ponders her alleged “error,” the more she realizes that something about the way her patient died doesn’t add up. Digging deeper into the records of the case, Hannah discovers a number of puzzling inconsistencies. She begins to suspect that someone has framed her for her patient’s death. But who would do such a thing, and why? And, more importantly, if there was no error, then why did her patient really die that morning?