Rachel's Fold follows the lives of four girls on the brink of adulthood.

When Maddy, Gayle, Jillian, and Regan find themselves at Miss Webster's School for Young Women, they quickly see it is not for them. Attempting to find their place, the four sneak out of the school and board a ship for Spain. The plan is to be missionaries. Their dream is shattered when they arrive in war-torn Belgium during the Great War.

Dropped in the middle of a ravaged country, they find themselves at the DeVoss field hospital. Dr. Levi DeVoss runs his hospital strictly by his rules. He needs nurses, not missionaries. The risk is too great to send them back. The only way to protect them is to keep them secluded at his compound-and away from the male species.

Adjusting to the new way of life thrust upon them, the girls begin to learn the best-laid plans are God's plan. Working with their initial plan, they turn their sorrow into joy and their ashes to beauty. The four girls become women of strength. Will they all make it home? If they do, will their hearts be intact?