Before Madeleine Kimble's mountaineer husband, Aidan, climbs Mount McKinley's south face, he makes her a solemn vow: I will come back to you. But late one night, Maddie gets the devastating news that Aidan has died in an avalanche, leaving her to care for their son-a small boy with a very big secret. The call comes from J. C., Aidan's best friend and fellow climber, whose grief is seasoned with survivor's guilt . . . and something more. J. C. has loved Maddie for years, but he never wanted his chance with her to come at so terrible a cost.
Across the country, Nicholas Sullivan wakes from a motorcycle crash with his memory wiped clean. Yet his dreams are haunted by visions of a mysterious woman and a young boy, neither of whom he has ever met. Convinced that these strangers hold the answers he seeks, Nicholas leaves everything behind to find them. What he discovers will require a leap of faith that will change all of their lives forever.