The Journey Begins

A long-planned river cruise through Europe. A centuries-old secret hidden in plain sight. And a trail of clues someone is willing to kill to protect.

When Jack Callahan, his wife Bree, and their longtime friends board a Rhine river cruise, they expect castles, cathedrals, wine country, and a few good stories to bring home.

Instead, they find themselves pulled into a mystery stretching across generations—and into the path of a killer who always seems to be one step ahead.