Following a fierce argument with Earl, Robbie storms out of the house to meet Spike and discovers an appealing leaf that, when ingested, makes them both effusively happy. Upon returning home, Earl is surprised to find Robbie in such an elated state until he samples some of Robbie's leaves. Expecting to find father and son at war, Fran is puzzled when she discovers Earl and Robbie arm in arm. Suspicious of the tantalizing leaves, Fran exhibits cautious restraint and becomes increasingly concerned when her family happily decides to remain at home rather than go to work or school. Earl's lack of concern after discovering he has been fired forces Fran, who refuses to become co-dependent, to abscond from the house and leave a delirious Earl, Robbie and Charlene to hopelessly fend for themselves. Having run out of leaves, they are forced to recognize what they have become, but Spike tests their resolve when he uncovers fresh leaves. This leaves them with a choice of two things: their lives, or the plant. At the end of the show, Robbie gives a PSA announcement why drugs are bad and what happens to people when they take it.

A petty territorial dispute between the main dinosaurs and the four-leggers across the swamp escalates into the first war ever to exist. Robbie is selected to go into the 'Nuts To War' war. However, Fran is worried and scared to death that Robbie will be killed in the war, so she decides to let Earl and Roy go to the battlefield.