There is a thief who has been stealing things from gardens, so Betty DeVille sets up a neighborhood watch to catch the thief. Tommy's friends think that the thief is Dil after Tommy finds Susie’s bike in their garage and the Deville’s garden gnome in Dil’s room. Dil keeps denying that he is the thief, so Tommy holds a sleepover inviting Chuckie, Phil and Lil to stay over and help him catch Dil. As well as catch Dil in the act Tommy, Phil, and Lil are studying for the Standardized Test and are freaking out. It turns out that the thief was Tommy, but only because he was sleepwalking with a statue flamingo due to the amount of stress that he was under from studying for the Standardized Test.