High school senior Decker Savage, burdened by his baby brother’s death and dreading his parents’ impending divorce, sees his mother with a scruffy stranger and follows him to a dark house. He hears shouts upstairs, a man hits the floor, and the culprit escapes. Decker follows the victim's ambulance. Through their mutual love of baseball, they become friends; but the elderly man can’t remember who attacked him, and Decker fears the assailant will return. His grades crater, his relationships go south, his baseball skills are erratic, and by entering the man’s house, he broke the law.

He suffers anonymous attacks and receives threatening notes: if he doesn’t forget the man and the house, he, his family, and his friend will be the next victims. Will Decker be able to uncover the culprit’s identity, solve the mystery, and stop the attacks?