An explosive attack on a Customs officer triggers a dangerous change in the Liverpool drugs war - and is the start of a new assignment for Harry Ferguson. Leaving behind the Kilos, he joins the Lima team, the 'All-stars' of Customs Investigation Division, and starts with the dealings of John Haase, who runs a heroin network supplied by a Turk named Volkan. But Volkan also supplies an equally ruthless gang in Brixton and the Limas become dangerously stretched trying to keep a grip on the spiralling case in two cities plus the ever-present threat of an attack on the officers themselves. This dramatic true story of an undercover operation has shocks, surprises and an extraordinary twist.