Ex-policeman Rollo Lee is sent to run Marwood Zoo, the newly acquired business of a New Zealand tycoon. In order to meet high profit targets and keep the zoo open, Rollo enforces a new ‘fierce creatures’ policy, whereby only the most impressive and dangerous animals are allowed to remain in the zoo. However, the keepers are less enthusiastic about complying with these demands.

John Smith has been happily involved in a bigamous marriage for five years. He lives with Stephanie in Finsbury and Michelle in Stockwell. Fortunately, for John, he’s a taxi driver which involves varying shift work! Simple? Well, when John unwittingly becomes a have-a-go hero and the Finsbury and Stockwell police forces discover something suspicious in their paperwork, John’s happy bubble is about to be burst. The action of the movie takes place during the next hectic 24 hours as John, with the assistance of his gullible neighbor Gary, rush between North and South London attempting to thwart the police and prevent the two loving wives coming face to face!