Fourteen-year-old Tessa Ryker hears shots. Sees someone leaving her home. The sharp tang of gunpowder invades her senses as she enters the house. Before she understands what she smells or her eyes adjust from the outside brightness, she covers her mouth in horror. Her mother dead on the hallway floor. Her father dead in the living room a gun in his hand. It looks like he killed his wife and then himself. But Tessa knows what she sees isn't true. She...