The Camdens become suspicious when Matt's new girlfriend, Tia, wants to spend more time with the family rather than being alone with Matt. Lucy enlists the help of Matt to overcome her clumsiness in order to try out for the cheerleading squad. Annie yearns for more romance in her marriage with Eric as she has become bored with the every-day routines. Simon tries to make himself invisible and tries to convince the whole family that he can be invisible.

Matt takes the blame for something Mary did, complicating the rift between Matt and Eric; Lucy takes credit for a paper Mary wrote.