England stands divided: king against Parliament, town against country, brother against brother. For Captain Stryker, scarred hero of a dozen wars, the rights and wrongs of the cause mean little. His loyalties are to his own small band of comrades — and to Queen Henrietta Maria's beautiful and most deadly agent, Lisette Gaillard. So when Prince Rupert entrusts him with a secret mission to discover what has happened to Lisette and the man she was protecting — a man who could hold the key to Royalist victory — nothing, not false imprisonment for murder, ambush, a doomed siege or a lethal religious fanatic will stand in his way. From the bloody rout of Cirencester, to the siege of Lichfield and finally to the killing fields of Hopton Heath, Michael Arnold brings vividly to life all the drama and the passion that lay behind the English Civil War.

Once seen in the heat of battle, Captain Stryker is never forgotten. A hardened veteran of the wars in the Low Countries, he has come home to England to seek revenge on the man who left him for dead and scarred him for life. Stryker is driven by loyalty rather than conviction to serve King Charles's cause. He has no truck with aristocracy, preferring the company of a handful of trusted men, including sometime actor Lancelot Forreseter and his foul-mouthed sergeant, Skellen. But when the existence of a dangerous spy at the heart of the Royalist establishment is discovered, it is Stryker whom Prince Rupert chooses to capture the man before he realises the game is up. Lightly armed and with only a handful of men, Stryker must journey across a country riven by bitterness and beset by marauding bands of soldiers in a race against time. But unbeknown to Stryker, someone else is also closing in on his quarry, someone whom Stryker has sworn to kill: Captain Eli Makepeace, his nemesis, the man who nearly destroyed him...

The forces of King Charles are victorious; their Parliamentarian enemies in deep crisis. In the west, the crucial port city of Bristol has fallen, and Royalist eyes fall quickly upon neighbouring Gloucester. Its walls are weak, its garrison under strength, and its governor — Sir Edward Massie — suspected of harbouring sympathy for the King. Stryker and his men are with the army as it converges on Gloucester, still reeling from the loss of a close friend at the bloody Battle of Stratton. Ordered to infiltrate the rebel city on a mission to discover whether Massie will indeed surrender, Stryker reluctantly embarks upon his most desperate mission yet. But Gloucester's defenders are more resolute than any had imagined, and catastrophe soon befalls him. With his life seemingly forfeit, Stryker is spared by an unlikely saviour; Vincent Skaithlocke, his former commander. The mercenary has returned to England to fight for Parliament, and offers Stryker his protection. As old friends adjust to life fighting for opposing sides, Stryker begins to question his own loyalties... but a chance discovery makes him realise that all in Gloucester is not what it seems, for a hidden menace threatens his own life, and that of King Charles himself.