Keith invites his girlfriend, Rosie, to move down from Leeds to live with him at his bachelor pad in London. He begins by clearing out some of his old stuff to the charity shop, before Rosie arrives. However, Rosie's arrival shocks Keith, with her claim that there has to be a few changes if she is to stay permanently. Keith makes the suggestion that the pair buy a house, but unbeknown to Rosie, he takes a six million pound house on rent, but informs her that he actually owns it. Rosie later feels neglected when Keith goes to record an episode of Celebrity Juice.

Keith heads down to the gym in an attempt to get in shape, but soon becomes jealous of Rosie's personal trainer, Mark. Keith and Rosie organise a movie night, and buy some ridiculous costumes to wear. Rosie helps Keith write his latest book, Being Keith. Later, the pair jet off to Marbella to shoot Keith's very own calendar for 2013. However, being unable to tell Rosie that he loves her, and flirting with a group of girls leaves Keith in the doghouse. Back in Britain, cracks are beginning to appear in their relationship - are they strong enough to forgive and forget?

Following a spectacular row with Rosie in Marbella, Keith goes AWOL on the Spanish Riviera. When he finally decides to return to Britain, he has to build up the courage to apologise for his action. Later on, Keith tries to make amends by taking Rosie out for a very special dinner, surrounded by a group of choir singers. At the premiere of his debut movie, Keith Lemon: The Film, Keith catches up with some of his celebrity friends. Rosie's bubble begins to burst when Keith reveals that their house is in fact rented, and not his own, as he previously claimed it was.