Winter 1644, the Tower of London. Colonel George Monck has been charged with high treason. A brilliant soldier, admiral and military governor, Monck joined the King's men in besieging Nantwich. But the Parliamentary side's more disciplined army successfully routed them, and Monck was thrown in jail. Brooding and despondent, Monck's troubles look to intensify when he starts an affair with Anne Ratsford, a married woman who is caring for him in The Tower. Monck is not only risking his reputation, but his life. But then his fortunes begin to change. Word of his prowess has reached Parliament, and he is offered a position within their army. All that stands in his way is his honour...