However, the haunting memory of Dominique Kohl, a young subordinate he failed to protect, fuels Reacher's determination, pushing him to ensure that no one else falls victim to Kott's brutality.

A powerful general, Tom O'Day, sends Reacher undercover to Paris to discover who is behind the assassination attempt, and to save the upcoming G8 meeting which is going to be held in London.

Reacher finds out that a dangerous gang using snipers – among whom there is Kott, arguably – has actually got a base in London, specifically centered in Chigwell, is the bedrock of a burgeoning threat to global security.

Charlie White, the seasoned leader of the "Romford Boys," orchestrates criminal enterprises across east London while forging alliances with dangerous Serbian gangs in the west.

Reacher, accompanied by CIA agent Casey Nice, strategically navigates towards the residence harboring Kott, a property belonging to Charlie's imposing associate, Joseph "Little Joey" Green.