Grand Canyon is a rugged, majestic wilderness. When Claire, her childhood friend, and her friend's sixteen-year-old son join a two-week trip rafting the Colorado River through the canyon, Claire expects exquisite beauty and a deep, natural silence. The rocky refuge also offers scorching hot days, relentless winds, and threatening storms. Amid a steady stream of wild, harsh scenery, the white-water rapids provide unceasing excitement. As they descend the immense river, the rafters wend their way deeper into the sculpted canyon, through the mesas of the arid Arizona desert, and onto Indian reservation lands. Immersed in river lore and magic, the guides row skillfully down the canyon until the river flow unexpectedly rises and the canyon's changing conditions threaten tragedy. For the guides who have spent years in the canyon, the river is unknowable. For those with less experience, a journey in Grand Canyon can be life changing.