With an arrest record 400% higher than anyone else on the force, Sgt. Nicholas Angel (SIMON PEGG) is the best cop in London. Yet, his success has his superiors worried, namely that he's making everyone else look bad and could result in downsizing if there aren't any criminals left.
Accordingly, they transfer him to the village of Sanford, known as the safest place in England, where his serious, by-the-books demeanor and cop behavior clash with the quaint town where most everyone is laid-back. That is, except for local cop Danny Butterman (NICK FROST) whose father, Frank (JIM BROADBENT), runs the local police station.
Unlike detectives Andy Wainwright (PADDY CONSIDINE) and Andy Cartwright (RAFE SPALL), or lone female cop Doris (OLIVIA COLMAN), Danny is enthusiastic about having Nicholas around. Constantly asking his new partner if he's done any number of things often seen in cop movies, Danny is slightly irritating to Nicholas who meanwhile tries to apply his big city policing to any number of small incidents that pop up. That amuses the locals such as businessman Simon Skinner (TIMOTHY DALTON) who runs the village grocery.
Yet, when some locals end up dead, Nicholas thinks something fishy is occurring, unlike everyone else who just sees a series of unconnected, random accidents. Knowing he's right, Nicholas sets out to find the culprit, eventually leading to Danny getting to act out his favorite cop movie scenes.