In the latest novel in S. J. Rozan’s groundbreaking mystery series, Lydia Chin and Bill Smith face a dangerous task: they must unlock a hospital's many secrets in order to save an innocent man.

With River Valley Hospital in the midst of negotiations to avert a nurses' strike, a wealthy benefactor is set to give a large donation in honor of the Chief of Emergency Medicine: Dr. Elliott Chin, the brother of private investigator Lydia Chin.

Before the donation can be finalized, a member of the nurses' negotiating committee is found murdered. A morgue assistant is arrested and although he denies even knowing the victim, his father and brother, both doctors at the hospital, are quick to urge him to take a plea. Another negotiating committee member abruptly resigns and a senior biomedical technician disappears. An officially off-limits section of the hospital basement turns out to be a hotbed of unauthorized—and in some cases criminal—activity.

Hired by the arrested man's lawyer, Lydia Chin and her partner Bill Smith start to dig into the events and personnel at the hospital. Among the union disputes, blackmail, thefts, lies, and a detective who really, really doesn't like them, one thing becomes clear: the dictum to "First Do No Harm” is not in effect at River Valley. As time runs short, Lydia and Bill face a complicated and dangerous task: they must unlock the hospital's secrets to save an innocent man.