As if her life wasn't complicated enough, people start dropping like flies in her rural ER. As she looks for the cause, she gets caught in a web of deception and death, threatening everything she loves. Using her courage and medical knowledge, Emma fights the fight of her life to protect those she holds dear. Will she destroy the evil, or will it crush her first?

Dr. Carrie Bryant's four years as a neurosurgical resident at White Memorial Hospital have earned her the respect and admiration from peers and staff alike. When given the chance of performing her first unsupervised brain surgery, Carrie jumps at the opportunity. What should have been a routine, hours-long operation turns horribly wrong and jeopardizes her patient's life. Emotionally and physically drained, Carrie is rushed back to the OR to assist in a second surgery.

Medical student Amy Brenner is spending the night on a locked psychiatric ward. Amy has been dreading her evening working on Ward D, the hospital’s inpatient mental health unit. There are very specific reasons why she never wanted to do this required overnight rotation. Reasons nobody can ever find out. And as the hours tick by, Amy grows increasingly convinced something terrible is happening within these tightly secured walls.

Dr. Toby Harper works the night shift in an emergency room. She spends her daytime hours alone with her mother who suffers from Alzheimer's disease. When elderly Alzheimer's patients from the same retirement home start dying mysteriously, Toby is the only one suspicious enough to investigate. As a result she finds herself, her mother, and her own sanity at risk.

Returning to practice after a suspension for stealing opioids, a young doctor takes the only job he can find: a post as a physician at the struggling St. Luke's Hospital in east London. Amid the maelstrom of sick patients, overworked staff and underfunded wards, a more insidious secret soon declares itself: too many patients are dying. And a murderer may be lurking in plain sight.

DC Heart surgeon Dr. Steven Leeds is suddenly besieged by a handful of immensely complicated heart attack and stroke cases, all caused by a rare arterial injury—a dissection. Private detective Kirk Miner and FBI agent Jack Mulville investigate, and they immediately suspect Leeds’ former lover, who harbors a grudge against all the victims. Then when prominent people in the US government begin to experience these same deadly cardiac emergencies, it falls to the unlikely team of three to snuff out a catastrophic plot that only the medically astute can divine.

Lily Bradley is a respected psychotherapist married to a distinguished professor. They live in a dream house with their two children in close-knit Story Cove. Lily lives a well-ordered life. Or so it seems. As a therapist, she knows everyone keeps things hidden. Even her. Then sensual and free-spirited Arwen Harper rolls into town in her hand-painted VW van, her sixteen-year-old son riding shotgun. Overnight, Story Cove’s secrets are no longer safe. Because Arwen might know her new neighbors better than they know themselves.

Newly minted chief resident at Boston Memorial Hospital Noah Rothauser is swamped in his new position, from managing the surgical schedules to dealing with the fallouts from patient deaths. Known for its medical advances, the famed teaching hospital has fitted several ORs as "hybrid operating rooms of the future" - an improvement that seems positive until an anesthesia error during a routine procedure results in the death of an otherwise healthy man.

The master of medical suspense brings us another novel of controversy, biology, and human greed. Internist Matt Rutledge has spent the last five years trying to find links between the deaths of his wife and his father. He suspects the Belinda Coke and Coal Company has released toxic chemicals into the environment that have caused the "Belinda Syndrome," a miasma of symptoms that include violent and deadly paranoia in some, Ebola-like hemorrhaging in others. But he lacks proof.

Twenty-eight-year-old Sean McGillin is the picture of health, until he fractures his leg while in-line skating in New York City's Central Park. Within 24 hours of his surgery, he dies.

Dr. Mallory Hayes, a Centers for Disease Control and Prevention (CDC) medical investigator, is a committed physician and researcher quietly battling height and air-flight anxiety. When a tsunami devastates the coast of Southern California, the Federal Emergency Management Agency (FEMA) establishes a camp to house the tens of thousands of people displaced by the disaster, and the Army is brought in to provide medical services.

When President Geoffrey Hilliard’s son Cam, a 16-year-old chess champion, experiences extreme fatigue, moodiness, and an uncharacteristic violent outburst, doctors are quick to dismiss his troubles as teen angst. But Secret Service agent Karen Ray summons her physician ex-husband for a second opinion. Dr. Lee Blackwood’s concerns are dismissed by the president's team - until Cam gets sicker. Lee must make a diagnosis from a puzzling array of symptoms he's never seen before. His only clue is a patient named Susie Banks, a young musical prodigy who seems to be suffering from the same baffling condition as Cam.

It’s hard meeting your ex after so much time apart. You remember the tears and accusations, the desperate look on his face as he punched the wall, but you try not to show it. You smile politely, even while your heart beats faster. You watch as he looks down into the stroller, at the beautiful blond-haired, blue-eyed baby kicking his little legs in the sunshine, whose innocent smile lights up your world. You see his face change. You know what he’s thinking. The next day he calls. His voice is shaking. He wants the truth. Is it his child?

Foster sisters Krystal and Nichole have always been there for each other, so when Nichole is committed to a psychiatric hospital after trying to kill her husband, Krystal drops everything to defend her. Scarred by a hard upbringing, Nichole and Krystal managed to construct comfortable lives for themselves. Krystal became a respected lawyer, and Nichole was happily married to an architect - until Nichole starts raving that her husband isn’t her husband, believing that he’s an imposter.

Fourteen years ago, prosecutor Jessica Yardley's husband went to prison for a series of brutal murders. She's finally created a life with her daughter and is a well-respected attorney. She's moving on. But when a new rash of homicides has her ex-husband, Eddie, written all over them - the nightmares of her past come back to life.