Man and mouse: comrades who together navigate a world of saints and sinners, and crimes both real and imagined.

Spence is lost—the brief optimism of his early retirement and bold move from Vancouver to Montréal has devolved into a lonely round of French classes, winter cycling and watering his absent daughter's houseplants. When a mouse moves into his Notre-Dame-de-Grâce apartment uninvited, Spence welcomes the company and the two form an unlikely friendship.

Thierry is a petty thief with strong opinions and a foul mouth who draws the former Drama teacher into an unexpected theatre of conspiracies. He becomes Spence's little brother, helping him learn French, confront painful memories and reaffirm his Catholic faith. A darkly comic story of rebirth that is both poignant et amusant, sacred et sacrebleu.