An exceptionally skilled but overachieving London police officer is transferred to the seemingly tranquil and crime-free village of Sandford. Despite his impressive arrest record and dedication to law enforcement, his relentless drive to upend every petty crime makes him unpopular among his colleagues, prompting his superiors to move him to a place where his skills would be less conspicuous. In Sandford, he struggles to adapt to the village's relaxed pace and finds little use for his intense policing style. His new partner is a bumbling but well-intentioned constable who idolizes action movies and longs for a more exciting beat.

The tranquility of the village is disrupted when a series of bizarre accidents begin to occur, raising suspicions of foul play. The transferred officer's attention to detail and refusal to accept simple explanations lead him to uncover clues that suggest a darker force at work beneath the town's idyllic surface. His sense of duty compels him to investigate, and together with his naïve yet enthusiastic partner, they engage in unconventional and comical detective work to unravel the mystery. The pair soon find themselves delving deeper into the town's secrets, challenging the status quo, and confronting the resistance of the close-knit community.