The killer: Tom, a high school student. The victim: Glen Martin, the popular singing science teacher at Tom's high school. Tom is an oft picked upon quiet student who plays the bass drum in the school's marching band. He likes to remain invisible as it allows him to be quietly subversive, as displayed by his favorite activity called "creeping": sneaking into houses and stealing a small memento just for the thrill of it. He introduces his best friend Willie to the activity, the house chosen this evening being the Martin's. As the Homicide Department investigates the murder, which was conducted by blunt force trauma to the head, they follow the usual leads such as his wife, Linda Martin, who was having an affair, but vows that she still loved Glen, and Linda's lover, a new immigrant named Arman Pozner. The questions become whether they will piece together the evidence, and or if Tom's nervousness will give him away. Meanwhile, Angie tests the boundaries of parenting with her son, Manny.