Big Little Crimes tells the remarkable stories of ordinary beat coppers who stumble upon a key piece of evidence — a haul of stolen goods or a suspect on the run — and bring a major criminal to justice. A suspicious police officer discovers a crooked solicitor is facilitating sham marriages for money. A report of poaching leads officers to a hidden drug den and an international smuggler, and a dodgy number plate sends officers on a high-speed pursuit of an armed criminal.