Dundee, Scotland, 1862. After the mill of businessman Matthew Beaumont burns to the ground, Detective Sergeant George Watters is sent to investigate. Soon, George discovers that this is not the first property that has been targeted. When a man is found dead in the hold of a trade ship, George discovers a shocking connection between Beaumont and foreign powers threatening the very country.

Kent, England, 1762. Bloody smuggling wars are raging on England's southern coast. It's a time of daring men and bold women, and deadly skirmishes between rival gangs and the law. John Smith, a man both hanged and drowned, returns to his home village, swearing vengeance on the landowner who killed his father. There is no quarter asked or expected when Smith begins to carve out his place among the Free Traders of Kent. What he doesn't know is that the Preventative Service has sent Ambrose Grant - their most effective man - to hunt him down.

After surviving the Battle of Culloden in 1746, young Hughie MacKim swears a blood oath to avenge the murder of his brother. Trained as an infantryman in Fraser's Highlanders, Hugh joins the Army himself and follows the trail across the horror of war in North America, through to the Battle of the Plains of Abraham in September 1759. But how can he trace the men in the anonymous ranks of the British Army?

Burmese War, 1852. Unable to join the famous Royal Malverns, Jack Windrush is commissioned into the despised 113th foot. Determined to rise in the ranks and make a name for himself, he is sent with the 113th to join the British expedition. But when they get involved in the attack of Rangoon, Jack realizes that war on the fringes of the empire is not as honorable and glorious as he expected. After a chance meeting with a renegade British soldier, Jack witnesses the true terrors of war, and begins to question the whole framework in which he has grown up.

Hours later, the man’s cold body lies in the city mortuary, alongside the woman he couldn’t save. And his sister, unconventional nurse Gemma Tate, tracks down troubled police inspector Sebastian Bell to unravel the truth. Sebastian has enough pressure to solve the murder of an aristocratic heiress without Gemma meddling in his case. But the cryptic sentences she brings him from her brother’s notebook could be a crucial lead. If only they knew what “milky way” meant.