George Crosby, a New York lawyer, with a passion for painting, wearied of his legal duties, sails for Brittany, where he meets Renée Kerouac, a fisher-maiden, and sketches her as a Corregan, a fairy who destroys the men who refuse her love. Hoel Kalloc, her betrothed, becomes jealous, and George marries her, after saving her from Hoel's brutality.
In a peasant's cot we find a fair, young maiden who is loved by an honest, true-hearted peasant lad, while yonder stands the manor of Glenwood with its noble lord, who chanced to pass by one fair day and there noble eyes met peasant meekness and love found work a-plenty to do. But maiden thought naught of my lord o' the manor, nor so much as gave him cause to hope that all his castles and lands could win her heart from the true peasant lad who had gone forth in the world to win humble living for his bride to be. It was then that Dame Poverty came knocking at the peasant's door and upon her heels crept a fever which held the young sister close within her breast only waiting for death to knock gently at the humble cot. And still no word from the loved one in a foreign land! Had he deserted his fond-hearted lassie? Weeks passed by and still no word nor sign of the one held most dear, and then my lord of Glenwood Keep came suing for her hand.
The forerunner of all serials, What Happened to Mary was a series of twelve monthly one reel episodes, each a complete entity in itself, revolving its immediate dramatic and melodramatic problems within the framework of a single episode and designed more for story and suspense situations than action.
The father of a working class family is having trouble finding a job, because the local textile mill is hiring only inexpensive child labor. Reluctantly, he allows his oldest daughter to work in the mill. Meanwhile, in New York, the wealthy businessman Hanscomb is being urged to speak out against child labor, but he declines to do so. Then, while Mrs. Hanscomb and her daughter are traveling, the young girl accidentally wanders away, gets lost, and is taken in by the working class family. To help them, she takes a job in the mill. While this is taking place, Hanscomb has initiated a search for the daughter even as he goes about building up his financial empire.