A young mother is recuperating in a San Francisco hospital when she is suddenly gasping for breath. The call button fails to bring help in time. The hospital's doctors, some of the best in the nation, are completely mystified by her death. How did this happen?

This is not the first such case at the hospital. Just as patients are about to be released with a clean bill of health, their conditions take a devastating turn for the worse. Could these cases be appalling coincidences? Or is a maniac playing God with people's lives?

It's a wild race against time as Lieutenant Lindsay Boxer and the newest member of the Women's Murder Club, attorney Yuki Castellano, lead an investigation into a string of these mysterious patient deaths, and reveal a hospital administration determined to shield its reputation at all costs. And while the hospital wages an explosive court battle that grips the entire nation, the Women's Murder Club hunts for a merciless killer among its esteemed medical staff.