For five years, John Smith has successfully maintained a double life, being married to both Stephanie in Finsbury and Michelle in Stockwell. His job as a taxi driver, with its unpredictable hours, has conveniently helped him juggle his dual commitments. However, things take a turn when John inadvertently becomes a local hero, prompting the Finsbury and Stockwell police departments to notice irregularities in their records. Suddenly, John’s carefully managed life is on the brink of unraveling. The film unfolds over a frantic 24-hour period as John, aided by his naive neighbor Gary, dashes between North and South London in a desperate bid to outsmart the police and keep his two unsuspecting wives from meeting each other.