Lindsay Boxer is learning to love again. After the picture-perfect world she shared with her husband, Joe, and their beautiful young daughter shattered under the weight of Joe's double life, Lindsay is determined to put the pieces back together. But before she can welcome Joe back with open arms, their beloved hometown of San Francisco faces a threat unlike any the city -- or the country -- has ever seen. A wave of possibly unnatural heart attacks claims the lives of seemingly unrelated victims. As if that weren't enough, the bomber she and Joe captured is about to go on trial, and his defense raises damning questions about Lindsay and Joe's investigation. Not knowing whom to trust, and struggling to accept the truth about the man she thought she knew, Lindsay must connect the dots of a deadly conspiracy before a brilliant criminal puts her on trial.