As the Otto family ushers in a new era, Katie and Greg make the emotional decision to sell the family minivan. Meanwhile, Oliver suffers a setback that forces him to rethink how to accomplish his goals.

When Anna-Kat's school lunch lady refuses to make simple eco-friendly changes in the school cafeteria, Greg enlists the help of his friend and fellow environmentalist Bill Doty. In an attempt to win over the lunch lady, they put on a show at the school highlighting the importance of recycling; but when those efforts fail, Greg is forced to call in reinforcements: "Mr. Green"! Meanwhile, Katie discovers that Taylor went behind her back to obtain a prescription for birth control; things quickly go from bad to worse when Katie learns that Angela is the one who took her to get the prescription.