Sally's having a party and Tom and Roy are desperate to be invited. They offer to help Sally prepare for the party in the hope that this will secure them an invitation.

Sally, meanwhile, is very keen for Amber, Tom's daughter, to meet her successful and available son, Steve. Tom approves as this could help his own efforts to ingratiate himself with Sally.

Tom and Roy's efforts to get to the party are hindered when Tom joins Roy on his daily walk and falls and injures himself. Now Roy has to nurse Tom 24/7 and still help Sally with the party preparations. Even if they finally do get an invite, they realise they may have chosen the wrong day to have a competition to find out who has the strongest bladder...