This article analyzes the poetics of plot and imagery in the fiction of Ethel Lilian Voynich, focusing mainly on her novels The Gadfly, Olive Latham, and Jack Raymond. The study examines the artistic structure of plot, compositional organization, and the system of images used by the writer to reveal the psychological and ideological world of her characters. Special attention is paid to retrospective and chronological plot structures, internal conflicts, and the role of psychological narration in character development. The article highlights how Voynich combines realistic and romantic traditions to create complex literary heroes whose spiritual experiences reflect broader social and historical contradictions. The analysis also explores the classification of images in literary criticism, including main, secondary, episodic, symbolic, realistic, romantic, and natural images. Through characters such as Arthur Burton, Gemma Warren, Montanelli, Olive Latham, and Jack Raymond, the writer portrays themes of freedom, loyalty, suffering, faith, betrayal, and moral responsibility. The research demonstrates that plot and imagery in Voynich’s fiction function not only as formal artistic devices but also as essential means for expressing philosophical and psychological depth. Furthermore, the article reveals that natural landscapes, symbolic details, and internal monologues significantly contribute to the emotional intensity of the narratives. As a result, Voynich’s prose is evaluated as an important example of psychological and socio-philosophical literature in late nineteenth- and early twentieth-century English fiction.