Following a successful pilot, this exciting police drama returns for a series. It's based on the Metropolitan Police's Armed Robbery Squad. The crack officers are hunting a prisoner who has blasted his way out of jail with explosives. DI Charlie Scott, leads his elite band of officers in hot pursuit. The squad investigates a security van robbery which looks like an inside job. Meanwhile, escaped convict Dennis Worsley wants revenge – and Tate is top of his list.