Set against the stunning, raw backdrop of 1700s Canada, Frontier is a thrilling action-adventure series revolving around warring factions vying for control of the fur trade in a ruthless game of wealth and power. Irish stowaway Michael Smyth has barely stepped foot into the New World when he becomes embroiled in a dangerous battle between the fearless and violent Declan Harp and the formidable Lord Benton of the Hudson's Bay Company. A dramatic story of revenge and riches, betrayal and brutality, and survival of the fittest in the James Bay fur trade, everyone is gunning to be the last man standing – from the combustible Scottish Brown Brothers, to crafty ale house owner Grace Emberly, to treacherous Captain Chesterfield, to millionaire Samuel Grant. All are willing to do whatever it takes to hold the keys to the New World.
With a price on Harp's head, Fort James fills up with bounty hunters. Emberly and Chesterfield conspire for the good of the Fort. Michael and Sokanon struggle to keep the Black Wolf in business, as Grant and Carruthers compete for supremacy.
Bounty hunters find a prize in the North. Benton sails to England at the mercy of Everton, but makes a new friend. Michael has a plan to make the Black Wolf more money. Carruthers and Grant vie for the attention of a French Marquis, and Emberly finds herself in danger of losing her independence.
Michael digs the tunnel as Chesterfield conducts live drills. Emberly returns to Fort James to discover what Chesterfield has done to her alehouse. Elizabeth Carruthers lets Douglas get close and comes face to face with Grant.
Chesterfield reels from the theft of the pelts and searches for Harp. Michael meets with Pond and is faced with a hard choice when Sokanon arrives. Josephette and the Brown Brothers unite against Grant, and Harp must deal with enemies on all sides and make new alliances in the Season 2 finale.