University lecturer Neil Tannahill is drawn into a sinister conspiracy involving secretly-stored Soviet nuclear waste at a remote British nuclear facility after receiving an enigmatic note from legendary atomic scientist and one-time former head of "Doomwatch" (the infamous Scientific watchdog group of the seventies), Dr Spencer Quist.
After the mobster who murdered his partner is acquitted, semicorrupt detective Robert Bryant hires a beautiful female assassin, Maria, to kill him. When he discovers that he cannot afford Maria's services, Bryant is forced to hire another assassin, Madison, to kill her. Maria survives the doublecross and sets out to collect what's owed to her, one way or another.
With the destruction of their previous neighbourhood has inevitably come the destruction of the lads’ favoured watering hole The Fat Ox. Again, it’s Bob rather than Terry who is visibly distressed by this. Upset and much the worse for free alcohol, Bob then storms into the library to seek sympathy from Thelma - who is, predictably, unimpressed. So when Thelma finds out that Terry has been getting semi-serious with glamorous Finnish shop assistant Chris, she takes it upon herself to try and pair them off for good via planning first a dinner party and then that mainstay of 70s comedy, a camping expedition. Of course, things don’t go quite according to plan and before you can say ‘I can see the way this is going’ we are set up for japes, larks and embarrassing incidents aplenty, which culminate in the lads getting rather fed up with their partners’ attempts to inflict the rugged outdoor lifestyle upon them and trying to hitch up and drive off with the girls still asleep in the caravan.