Boston Memorial Hospital is the familiar setting for Cook's fourth medical mystery. Amidst a hospital power struggle that pits resident doctors against private practitioners, eighteen cardiac surgery patients mysteriously die. Doctors Cassandra Kingsley and Robert Seibert investigate the deaths, making disturbing discoveries, such as a drug-taking, knife-happy surgeon and lethal IV's.

Dr. Robin Cook (born May 4, 1940 in New York City, New York) is an American physician and novelist who writes about medicine and topics affecting public health.
He is best known for combining medical writing with the thriller genre. Several of his books have been bestsellers on the "New York Times" Bestseller List. Several of his books have also been featured in Reader's Digest.