Table of Contents:

London and Edinburgh are under threat, but the danger is more personal than anyone expects. Sherlock Holmes and his brilliant team, John Luther with his intense and relentless crew, and John Rebus with his streetwise squad are drawn into a deadly game orchestrated by a mastermind who knows their minds, fears, and secrets.

As the three teams chase leads across cities and confront layers of deception, alliances are forged and broken, hidden agendas are revealed, and the line between justice and vengeance blurs. Every move is anticipated, every decision is tested, and the mastermind's reach seems limitless. In the end, the truth will shock them all, and London and Edinburgh will never feel safe again.