Morgan Russell returns from class one day to find her fiance brutally killed, and her dogs--a Great Pyrenees, and two pit bulls she was fostering--covered in blood. Bewildered and devastated that her dogs could have committed such violence, she worries that she might suffer from one of the syndromes she studies--pathological altruism: when selfless acts do more damage than good. When Morgan tries to locate Bennett's parents to tell them about their...