Bacon Sandwich is set early in the morning of Wendy and Greg's wedding day. Following conspicuously alcoholic stag and hen night parties, the bride and her chief bridesmaid wake up on a deserted train while the groom and his best man are in the care of the local constabulary. Greg is in a dress from the People's Dispensary for Sick Animals and Wendy is trapped in a ball and chain. These predicaments provide ample opportunity for the four friends to face each other with a few home truths about their relationships, superstitions and sexual prowess.