Chicago, 1924: Emily and her new husband, Henry, yearn to leave the bustle of Chicago for the promise of their own American dream among the harsh beauty of the prairie. But leaving the city means leaving Emily's beloved sister, Annie, who was once closer to her than anyone in the world.

Kansas, 1932: Emily and Henry have established their new home among the warmth of the farming community in Kansas. Aligned to the fickle fortunes of nature, their lives hold a precarious and hopeful purpose, until tragedy strikes and their orphaned niece, Dorothy, lands on their doorstep.

The wide-eyed child isn't the only thing to disrupt Emily's world. Drought and devastating dust storms threaten to destroy everything, and her much-loved home becomes a place of uncertainty and danger. When the past catches up with the present and old secrets are exposed, Emily fears she will lose the most cherished thing of all: Dorothy.

Bursting with courage and heart, Before Dorothy tells the story of the woman who raised a beloved heroine, and ponders the question: what is the true meaning of home?