The Rocky Mountains have cast their spell over the Courtlands, who are taking a family vacation before their daughter leaves for college. But when Caitlin and her younger brother, Sean, go out for an early morning run and only Sean returns, the mountains become as terrifying as they are majestic.

Written with a precision that captures every emotion, every moment of fear, as each member of the family searches for answers, Descent races like an avalanche toward its heart-pounding conclusion.