Zane Ranger has built a life on the Grand Canyon’s Colorado River, guiding successful expeditions through its wild currents. She found sanctuary in the remote landscape after a devastating breakup left her determined to keep her distance from love.

Helen Mitchell arrives fresh from a botany postdoc, hoping a field research position near the Grand Canyon will be her way into the future she wants. A two-week river expedition is part of the interview, and the rapids are nothing compared to her parents' controlling expectations.

Zane falls for Helen fast, hard, and completely out of her depth.

As the river carries them deep into the canyon, it strips away their defenses, revealing a connection they didn’t plan for and can’t ignore. But when Helen returns home for a final interview, the pressures waiting there threaten to undo their romance.

Out on the river, they might have a chance. Off it, the world is far less forgiving. They’ll have to decide whether they’re brave enough to turn their one river trip into forever.