Jack-of-all-trades Jimmy Venables is probably the only man in Britain who gets divorced and ends up with his mother-in-law. When his ex-wife volunteers to go to East Africa to help the victims of a natural disaster, weekend-dad Jimmy agrees to take care of their two teenage kids full-time in an attempt to win her back. Unfortunately, his posh mother-in-law Diana sees Jimmy as the true natural disaster and virtually moves in herself to keep order, keep an eye on things and undermine Jimmy whenever possible.