The Arkansas River is the heart and soul of Salida, Colorado. It fuels the small town's economy and thrums in the blood of twenty-seven-year-old Mandy Tanner, a river ranger. When a whitewater rafting accident occurs, she deftly executes a rescue, but a man dies anyway. But it wasn't the river rapids that killed him, it was poison. Tom King was a rich land developer with bitter business rivals, who cheated on his wife, refused to support his kayak-obsessed son, and infuriated environmentalists. Mandy cooperates with the local sheriff's department to solve the murder. But little does she know how greatly the case will affect those she loves, including her beloved Uncle Bill—the respected owner of an outfitting business, out of whose raft Tom King fell. She goes on an emotionally turbulent quest for the truth—and ends up in dangerous waters.