A young mother is recuperating in a top San Francisco hospital when suddenly she s gasping for breath. The call button fails to bring help in time. How and why did this happen? With help from the newest member of the Women s Murder Club, Yuki Castellano, Lieutenant Lindsay Boxer discovers that this is not the hospital s first suspicious case. Other patients have taken unexpected and devastating turns for the worse just as they re planning to go home. Are these just appalling coincidences? Or is a maniac playing God with people s lives?

When someone close begins to exhibit the same terrifying symptoms, Lindsay fears no one is safe. In a wild race against time she must fight an administration determined to shield its reputation even if it means hiding a killer...