2020 has been an absolute nightmare for the Jessop family. To boost family morale, they decide they are going to have a summer holiday after all, even if it is in Margate in October.
When Robin's attempt to stop Cherry's wedding in Scotland fails, the Jessop family holiday is in tatters. Until a run-in with the local police turns things around.
Paul gives Rachel a family voucher for a theme park, valid for six months. On the day before it expires and with a neighbour's dog in tow, the Jessops finally attempt to use it.
Rachel tries to 'fix' a painting of the family she commissioned after the artist made her look older, while Cherry launches her salsa class and Sue buys a pool.
The Jessops travel to Cardigan to confront Ray, Paul's old archery teammate and Rachel's ex-boyfriend, about cheating Paul out of a place in the 2008 Olympic team.
Sue's new Italian boyfriend, Alf, invites the Jessops to dinner at his restaurant while Robin asks Paul to go undercover to learn about Cherry's new boyfriend.
Paul is bogged down with earwax and boat repairs, as he attempts to convince daughter Amy about the wonders of Britain. Rachel overdoes it in her attempts to 'get down with the kids' on her university course. Robin gets a couple of shocks.
Amy is home for the holidays, and Rachel is determined to engineer a classic Jessop family Christmas, with stockings, presents, church, turkey, the King's speech and charades. It should be great, so long as everyone sticks to the schedule.
Rachel's excitement at organising a hag do for Robin and Cherry dissipates when every guest submits a conflicting preference for setting or activity. Amy struggles with Maya's closetedness. Sue baulks at Britain's monocultural birdlife.
Rachel's pretentious sister and husband arrive to irritate everyone, and put Rachel in an awkward spot. Robin opts to spend Paul's windfall on a Bulgarian property search. Cherry's wedding dress travails worsen her obnoxious tendencies.
Rachel's decision to get a tattoo runs up against her obnoxiously low pain threshold. Paul struggles with helmet problems. Sue laments finally moving out of the family home. A literal shotgun wedding for Robin and Cherry proves foolish.
