Det. Murdoch and Const. Crabtree investigate when a body is uncovered by workmen. The remains are quite old and date from perhaps the mid-1860s. Dr. Ogden's review of the remains indicate that he might have been murdered. Among the remains is a gin flask with a note secreted in a false bottom. The note is signed by none other than the man who would later become Canada's first Prime Minister, Sir John A. MacDonald. The dead man is soon identified and Murdoch's old nemesis from Ottawa, spook Terence Meyers, is on the scene as well. A surprise visitor to the station gives them vital information about the theft of $1 million in gold and a connection to the U.S. Civil War.

While investigating an explosion, Detective Murdoch infiltrates an anarchist group lead by American labour organizer Emma Goldman.

When a flying machine crashes, killing a man on the ground, Murdoch's investigation uncovers high-level conspiracy and sabotage in the race to achieve the first human-controlled flight.

After the assassination of U.S. President William McKinley in Buffalo, Ottawa-based spy Terrance Meyers shows in Toronto. The Canadian government is concerned that some of the assassin's co-conspirators may try to make their way to Canada to avoid U.S. authorities. Rumors have it that Emma Goldman is back in Toronto and the police begin rounding up anyone who might be considered the least bit subversive. Among them is Anton Wocek who is later found dead in a warehouse with Meyers standing by him with the gun in his hand. That's enough for the supremely arrogant American spy Allen Clegg who believes Meyers is part of the conspiracy. Murdoch sets out to prove Meyers' innocence and find out exactly what is going on.

Murdoch is summoned by no less than Prime Minister Laurier to head off the launch of an explosive-armed missile set to be fired from Canada to New York City unless a ransom demand of $4 million is met within the next 24 hours.

Theodore Roosevelt sneaks into Canada for a hunting trip.

Murdoch, Brackenreid and Ogden are named as accomplices when Terrance Meyers faces charges of treason.

Terrence Meyers tells Murdoch that James Pendrick has been kidnapped by Allen Clegg.

Hours before a clandestine visit by President Taft, Murdoch is entangled by Terence Meyers in an experiment gone wrong.