A young man’s devotion to his cousin is thwarted by her rigid adherence to a self-sacrificing religious ideal. Jerome and Alissa share a deep, childhood bond that matures into a complex romantic attachment, yet their connection is systematically dismantled by Alissa’s belief that earthly love is an obstacle to spiritual salvation. The narrative unfolds through a reflective, first-person perspective, documenting the psychological erosion of their relationship as Alissa retreats into a life of asceticism and moral austerity. The story operates within the constraints of early 20th-century French Protestant society, where internal moral conflicts dictate the characters' external actions.

Readers and critics frequently discuss the novel as a precise examination of how extreme moral convictions can destroy human intimacy. Discussion often centers on the tension between Jerome’s desire for connection and Alissa’s commitment to a narrow, spiritual path that necessitates the rejection of worldly happiness. Many observers highlight the effectiveness of Gide’s restrained prose in conveying the quiet, internal devastation of the protagonists. The work is often cited for its ability to capture the specific atmosphere of French Protestant life at the turn of the century while maintaining universal themes regarding the conflict between personal desire and perceived moral obligation.