In contemporary London, an ordinary man, Quan, finds himself caught in a whirlwind of violence and revenge following a terrorist attack that claims the life of his daughter. Quan, a former Vietnamese soldier with a dark past, is not the kind of person who gives up easily. With his world shattered and determined to seek justice, he embarks on an unrelenting quest to uncover the truth behind the attack.
His journey leads him to cross paths with Liam Hennessy, an Irish politician with ties to the separatist movement, who is trying to keep the repercussions of violence in Northern Ireland at bay. As Quan reveals a series of espionage and combat skills that surprise even the most trained, Hennessy finds himself caught between Quan's pressure and the dark secrets of his own political life.
As time runs out, Quan must be careful with his moves, as the secrets he unravels not only put his life in danger but also threaten the power dynamics between terrorist groups and the British government. The tension escalates, and the discussion of justice and revenge becomes a moral dilemma that will test Quan’s determination and force Hennessy to choose a side in this harrowing struggle between the past and the present. With an intense pace and unexpected twists, the story explores the depths of personal pain and the need for redemption in a world filled with shadows.