Bytown, 1836: The lawless cesspool that will become the city of Ottawa is beginning to reek of more than just swamp water. Rife with squalor, corruption, and organized crime, class injustice divides the town more starkly than the canal that bisects it, cutting off its Irish poor-who are ready to fight back. On a homestead in the woods near Bytown, a domestic drama is also reaching a fever pitch. Quiet, ungainly Mariah, her face scarred in a dog attack back home in Ireland, has been living on sufferance in her sister Biddy's home since they sailed for a new life. She's treated as the spinster aunt, a farmhand working alongside Biddy's husband, Seamus. But the three of them are keeping a bitter secret: Mariah, in love with Seamus, is the mother of Thomas, the family's oldest child. And she's about to burst under the strain of making herself small. While Mariah plots to claim her rightful place in the world, Thomas keeps secrets of his own. Eager to escape the roiling tensions at home, he's apprenticed himself to a blacksmith in Bytown, but soon falls into trouble too big for him to handle. To save himself, he's made a deal with the one man colder than the devil-Peter Aylen, leader of a powerful Irish rebel gang. As danger mounts, both for Thomas and for the town, there's only one way for Mariah to save her son: by becoming the hero of her own story, facing her deepest fears with a determination she never knew she had.