Marie de Flor, Jeanette MacDonald is a Canadian soprano who performs in Roméo et Juliette in Montreal, with the Premier Alan Mowbray in the audience. After inviting the premier and his entourage to dinner, she learns from a man named Boniface, George Regas, that her brother Jack Flower, supposedly in prison for armed robbery, was wounded while escaping and has killed a Mountie in the process. She resolves to venture into the Canadian wilderness to help Jack, and she is drawn onward by a sense of family duty. At the same time, Sergeant Bruce, Nelson Eddy of the Mounties, reports to headquarters and receives his latest mission: to locate Jack Flower, believed to be hiding near Lake Chibougam.
Marie and Boniface reach an outpost near Lake Chibou, where Boniface disappears with Marie’s money, leaving her to navigate a harsh frontier on her own. Marie then falls in with Sergeant Bruce, but she cannot reveal the truth for fear of compromising Jack. To make ends meet, she performs at a small local cafe and sings, though she struggles to earn even a few tips, underscoring the precariousness of her situation. Bruce presses Marie to report Boniface’s theft, yet her fear for her brother keeps her silent, and she adopts the alias Rose to mask her real identity. Despite the deception, Bruce has already recognized her by her voice, a detail that gradually binds them together in a tense, reluctant partnership.
The pair travel together to an Indian ceremony that night, sharing a moment of closeness through their singing, even as Bruce’s duty clashes with his fascination. Marie eventually locates Boniface and they depart together again, but Bruce’s pursuit deepens as he realizes she is really Jack’s sister and understands that she may lead him to Jack. The pursuit intensifies as Boniface and Marie press onward toward Hayman’s Landing, where Jack is believed to be hiding. In a dramatic turn, Bruce rescues Marie from drowning as they cross a treacherous river, and Boniface flees into the forest, leaving Marie to face her burden with renewed resolve.
Marie initially resists the Sergeant’s help, yet she recognizes that reaching Jack will require some form of teamwork. The pair spend the next three days traveling together before Marie parts ways with Bruce, choosing a new guide and continuing her quest on her own terms. Eventually she discovers Jack being cared for by Boniface’s mother, and she makes a decisive effort to persuade him to reform and build a new life. She provides him with money to start anew, but Bruce appears and arrests Jack, prompting Marie to plead for mercy. Bruce, remaining steadfast in his duty, refuses to release Jack, and the tension between justice and compassion hangs in the air.
No definitive resolution is offered for Jack in the immediate aftermath, and Marie, though visibly worn, returns to the stage. She takes on the title role in Tosca, and during the performance she imagines hearing the haunting refrain of “Indian Love Call” echoing through the opera, slumping on stage just before the final curtain. Retreating to a mountain lodge, she vows not to sing for six months. Her manager, Reginald Owen Myerson, visits to express disappointment that she will not perform again, and after he leaves, she dares to begin singing “Indian Love Call” once more. The moment culminates as Myerson urges Sergeant Bruce, who waits in the foyer, to join her, and together they sing, a bittersweet reconciliation of duty, longing, and art that lingers beyond the curtain.
