A wealthy and cultured middle-aged man, Mathieu, becomes infatuated with a young and alluring woman named Conchita. Mathieu's obsessive desire for her manifests as an intense pursuit. However, Conchita's reactions toward him are unpredictable and capricious; she oscillates between moments of passionate affection and cold rejection. Intriguingly, Conchita's character is portrayed by two different actresses, emphasizing her elusive and multifaceted nature. This dynamic creates an intricate and bewildering relationship where Mathieu is often left perplexed and frustrated by Conchita's erratic behavior.

Throughout the story, Mathieu goes to great lengths and endures numerous humiliations in his pursuit of Conchita, driven by an insatiable lust and need for control. Their relationship is marked by a series of dramatic encounters and power struggles that question the nature of desire, possession, and detachment. As Mathieu becomes more entangled in Conchita's enigmatic web, a broader backdrop of social turmoil and political violence subtly mirrors the chaos of their entanglement. The narrative deftly intertwines personal obsession with societal unrest, building tension as the plot progresses, leaving the ultimate resolution and the depth of Conchita's true intentions tantalizingly ambiguous.