Emily Bronte’s Wuthering Heights centers on the complex relationship, intertwined with love, hate, revenge and desire, between the Earnshaws and the Lintons that lasts for two generations. The development of the story accelerates and emotions explode when characters confront one another, but events meet unexpected turns whenever eavesdropping occurs. Wuthering Heights contains several eavesdropping scenes including the well-known one in which Heathcliff listens in on Catherine’s confession to Nelly. Furthermore, the novel itself is in fact a kind of eavesdropping on Catherine and Heathcliff’s intimate story first by Nelly, then by Lockwood and finally by the reader. Critical approaches regarding the novel, however, have curiously neglected the structure and effect of eavesdropping in Wuthering Heights. This essay aims to analyze the ways spatial boundaries are blurred or violated in the novel before, during or after eavesdropping scenes and relate them to the issue of social ranks and classes in nineteenth-century England. This essay also explores the effects of eavesdropping in terms of the core conflicts in the novel. In so doing, it argues that overheard words become intriguing stories that are passed on to and shared by numerous people, ultimately reconciling the two worlds Wuthering Heights and Thrushcross Grange. A close analysis of the structure and effects of overhearing in Wuthering Heights not only enables readers to better understand how conflicts are built, intensified and resolved in the novel, but also sheds a new light on M. M. Bakhtin’s insight that the essence of the modern novel is in fact eavesdropping.