Dr. Erica Rosen's world is turned upside down after a suicide bomber explodes amidst a large crowd entering Oracle Park baseball stadium, near her San Francisco home. Many are killed or injured, and police have no leads in solving the case. Erica becomes involved after a teacher of young autistic men calls her. The teacher believes her students are involved in the bombing but is afraid to contact law enforcement. She reaches out to Erica, who has experience with special needs children. Erica arrives at the school but finds the police already there and a young autistic man doing a jigsaw puzzle, oblivious to his murdered teacher on the floor. The young man has information about the mastermind behind the bombing but has limited ability to speak. Erica is determined to protect him, prevent further bombings, and find his missing classmates.