Mark still hasn't gathered together the courage to dump Sophie, something that proves a problem when they go to the country to meet her parents. Worse, he makes the mistake of inviting Jeremy along. Cue a weekend of gunfire, infidelity and arson.
Both Mark and Jeremy have trouble with Alan Johnson as he assigns Mark to oversee a difficult presentation to the JLB board, while the offer of a real life "indecent proposal" involving girlfriend Big Suze proves too tempting for Jeremy to resist.
To get some time away from his future bride Sophie, Mark joins a gym, where he runs into Jeremy's estranged American wife Nancy who is working there. Soon Jeremy is undertaking a porter's job at the gym in an attempt to win her back.
Jeremy is thrilled when one of his musical heroes, The Orgazoid, employs him as a general handyman - but just how "handy" will he have to be? Mark attends his old school reunion disco and finds himself falling for old crush Sally Slater once more. But with her a bored housewife, could an affair between them really happen? If Mark can conceal from Sally his own impending marriage.
Jeremy arranges Mark a canal boat stag weekend, but soon finds himself distracted by the beautiful Aurora. Mark is less excited by the prospect of a holiday romance with her sister, Lucy, but their dad might offer a way out of marriage to Sophie with a passage to India - well managing a call center out there at least.
It's the day of the big wedding and Mark is desperately looking for a way out of going through with it - but he's determined not to be labeled a jilter at any cost. Jeremy still harbors hopes of winning Nancy back, but being Mark's best man keeps getting in the way.