Sarasvati "Sara" Troy is determined to reach the peak for which she was christened, and to climb it in honor of her mother, who perished in a mountaineering accident when Sara was just a child. She asks her father, a celebrated mountaineer and philosophy professor, to organize and lead the expedition.The six climbers he recruits are an uneasy mix. They include his longtime friend Dr. Andrew Reddy, a recent widower, and Reddy's headstrong son; Wilder Carson, the acclaimed climber who is tormented by the death of his brother; Wilder's wife, Vida, a former lover of Dr. Reddy; and a distinguished scholar and his wife. The party's journey is harrowing, taking them from the mountain's gorge, into its sanctuary, and finally onto the summit, a path that evokes the hell, purgatory, and heaven of Dante's Inferno. As the air thins and this unforgettable journey unfolds, Sara emerges as a Beatrice-like figure, buoying her companions up the mountain through the sheer strength and beauty of her being.