As a child, a summer at Camp Reliant in the rugged hills of West Virginia changed Kate O’Riley’s life. Now, yearning for kids of her own, Kate has returned to the camp as a group counselor, hoping to make a difference in the lives of children who don’t feel like they fit in.

Gavin Buckley has been hired to survey a spectacular cavern complex near Camp Reliant property. His own childhood turned the handsome geologist into a confirmed bachelor, but from their first meeting—which leaves Gavin with a black eye and a soaring heart—he is smitten by the camp counselor.

Together, Kate and Gavin go on a journey of discovery into the spectacular heart of a mountain. Looking into the shimmering pools of moonmilk, the two will also look into their own hearts to see how deep their feelings run.