When Steve and Clare head out of town for a long summer weekend, Pete is put in charge for the first time in his life. He has grand plans to make martinis and call up girls but he and Rocco soon find themselves ensnarled in something even more dangerous. With Mike and Gracie’s help, they begin to uncover the mystery of their creepy neighbor Lester Tinkum. All the evidence suggests that Tinkum is the Unabomber—the number one domestic terrorist on the FBI watch list. With no parental aid in sight,