Nicholas Collini (Desi Arnaz) has to travel for his job as an engineer — so his fiancée, Tacy (Lucille Ball), suggests that rather than buy a house after their wedding, they invest in a motor home so they can see the country together. But the aggravations of life with nosy trailer park neighbors and the dangers of piloting an enormous trailer across narrow country roads soon take their toll on the happy couple, putting their young marriage in turmoil.