Concerned at the amount they're spending on takeaway food and expensive local food shops, Bob and Margaret journey to the Super Save Shopatropolis in Croydon.
Bob's brother Peter is a successful chef who has a new cooking show. He and his wife Rosie are traveling to India for it and need a favor from Bob and Margaret before they go.
A new dentist opens a practice right across the road from Bob's and steals all his customers. His receptionist also defects, so Bob hires Penny. But things are not as they seem.
It's time for the annual dental convention, but Bob isn't keen on going when he sees that Bernard Wiggins, a "loud-mouthed big shot" colleague from his student days, is a featured speaker.
Margaret fears that her relationship with Bob is getting stale after they have a petty argument. After talking things over, they plan an anniversary getaway...if they can actually get away.