Fran returns from a vacation in Cornwall to discover Manny has resigned and Bernard is living amongst piles of his own filth and dead badgers. Manny has taken up work at the new bookstore next to Black Books, where he must contend with a new, and possibly even more demanding manager, played by Simon Pegg.
It is International Children's Book Week, and Bernard and Manny decide to write their own kids' classic and retire on the proceeds. Fran is off on a hen weekend, but still finds a way to fall out with Bernard and Manny.
Manny is panicking about the impending visit of his parents - Fran blackmails Bernard into letting them stay by threatening to tell Manny Bernard has been screening his calls to keep him from going anywhere. When Manny's parents arrive however, the duo are forced to corroborate some slightly embellished details from Manny's letters home.
Manny places a bet on the Grand National for Bernard who immediately becomes addicted to the thrill of gambling having previously expressed no interest. But his losses mount, and he starts borrowing gambling funds from increasingly scary people.
Manny organises a travel-writing festival and invites a charming explorer to talk about his adventures. Fran soon falls for his twinkling eyes and lavish hair, leaving Manny ragingly jealous. Meanwhile, Bernard hires an assassin to solve a financial problem with his neighbour.
Fed up with being stuck in the dusty old bookshop on a Friday night, and with the hopes of meeting a delectable young lady at a party, Manny and Fran persuaded Bernard to attend a party. After a night of heavy drinking, a very sloshed Bernard has a nasty surprise waiting for him.