Shortly after renewing his wedding vows, Cuckoo flew the coop to continue researching his book. Whilst on walkabout in the foothills of the Himalayas, he went missing... eventually presumed dead. Two years after his disappearance and life in the Thompson family house is only just getting back to normal. Ken (Greg Davies) and Lorna (Helen Baxendale) are looking forward to a future without the kids under their feet. Dylan is about to go to university and Rachel is rebuilding her life with her new boyfriend, a nice-but-dull lawyer, Ben. Despite appearances, Cuckoo's absence is still felt not least by his young widow. Everyone worries Rachel has lost her mojo since the tragic events in Asia. The fragile equilibrium is well and truly shattered when a handsome and mysterious young stranger from Cuckoo's past (Taylor Lautner) appears in Lichfield, looking for a man who found fame and philosophy in the simplest of hot snacks: the jacket potato.