Dave (Dave Courtney) and Larry (Billy Murray) are brothers who jointly run a prominent London "firm". The film opens with Larry trying to cover his tracks after he has "knocked" a rival gang boss, for £100,000 of drug money. This is the catalyst for a dramatic chain of events that will lead to double-cross, murder, and ultimately full scale war between the brothers. Larry, a devious schemer, sees the drug trade as a lucrative way forward for the firm, despite his brother's protests, and when Dave, who is forced to kill Murphy to protect Larry, is arrested for murder, Larry takes the opportunity to set himself up as drug baron. With an improvisational narrative structure and a raw-edged stylistic approach, "Hell to Pay" has the uncomfortable feel of a fly on the wall documentary as it chronicles the sometimes chilling, sometimes routine events that typify the distinctly British gangster lifestyle.