On a rocky, windswept mountain ridge at the end of Mercy Road lives a family called Summer. Earl and Darlene, trappers born to the ridge, rooted to the land, struggle to find hope and love in an unforgiving place. Butch is their firstborn - with his father's brawn and his mother's tenderness, he would become his brother's keeper. Then Sid, the strange, silent son, willed to live by his mother's fierce love. And Tina, the only daughter, full of promise, but in whose heart beats her family's madness.

For the Summers, a difficult life comes apart one fall day when Darlene does the unthinkable, fleeing the ridge for a long, strange winter in New York. In the wake of her flight, each of the Summers is driven, as if by the land itself, to make choices that will shape the rest of their lives. Mercy Road becomes an epic drama of heroism and redemption, of the forces that bind us to the land that gave us roots, and of what is passed from generation to generation.