The arrival of the charismatic Augustin Meaulnes at a provincial school initiates a lifelong obsession with a mysterious, dreamlike encounter that alters the trajectory of his and his friend François Seurel's lives. François Seurel narrates the events, observing Meaulnes as he navigates the boundary between reality and the idealized memory of a hidden estate. Meaulnes seeks to reclaim a fleeting experience involving a beautiful girl and an isolated house, a pursuit that forces him to confront the limitations of his own desires. The narrative operates through a reflective lens, examining the tension between the stability of school life and the disruptive nature of romantic longing. The world is grounded in the French countryside, yet it is permeated by a sense of ethereal mystery that challenges the logical progression of the characters' lives.

Discussion often centers on the novel's ability to evoke the specific, melancholic atmosphere of youth and the elusive nature of past experiences. Readers frequently highlight the contrast between the grounded, mundane school setting and the surreal, almost mythical quality of the lost domain. Critics often point to the narrative's focus on the psychological impact of a singular, transformative event on the protagonist's development. The balance between the realistic portrayal of rural life and the romanticized search for an ideal is a frequent subject of analysis. Many readers find the work effective in capturing the specific ache of transition without relying on excessive sentimentality.