In a San Francisco hospital a young mother is recuperating. Suddenly she struggles for breath, and the hospital's doctors are mystified by her death. Then similar cases appear. Just as patients are about to be released, they become devastatingly sick. Lieutenant Lindsay Boxer and the Women's Murder Club probe deeper into the incidents, and they start wondering if the cases are coincidences. When someone close to the Club exhibits the same symptoms, Lindsay fears no one is safe.
