The adults accidentally left Grandpa behind at a gas station while trying to take home an easily-perishable banana tree they purchased from a nursery about 3 hours from home. Grandpa unwittingly hitches a ride with strangers, but everyone ends up at a cheesy, Canadian-themed tourist stop called ""North Of The Border"" (""Where You Can Go To Canada Without Crossing The Border""). Tommy & Chuckie try to reunite Grandpa with Stu & Didi, but there's one slight problem -- Grandpa thinks he's in Canada -- with no ID (Tommy threw his wallet out the car window).
