Big Little Crimes tells the remarkable stories of ordinary beat coppers who stumble upon a key piece of evidence — a haul of stolen goods, a suspect on the run — and bring a major criminal to justice. When a car is caught running a red light, police find themselves in a high-speed pursuit of an armed criminal. Elsewhere, a suspicious death leads an investigator to uncover a deadly plot to poison a man, and one investigator's instincts lead to the arrest of a heartless thief targeting vulnerable victims.