"The Woman in White is Wilkie Collins's fifth published novel, written in 1859 and set from 1849 to 1850. It is a mystery novel and falls under the genre of ""sensation novels"".
The story can be seen as an early example of detective fiction with protagonist Walter Hartright employing many of the sleuthing techniques of later private detectives. The use of multiple narrators (including nearly all the principal characters) draws on Collins's legal training, and as he points out in his preamble: ""the story here presented will be told by more than one pen, as the story of an offence against the laws is told in Court by more than one witness"".

Plot:

Walter Hartright, a young art teacher, encounters and gives directions to a mysterious and distressed woman dressed entirely in white, lost in London; he is later informed by policemen that she has escaped from an asylum. Soon afterwards, he travels to Limmeridge House in Cumberland, having been hired as a drawing teacher on the recommendation of his friend, Pesca, an Italian language teacher. The Limmeridge household comprises the invalid Frederick Fairlie and Walter's students: Laura Fairlie, Mr. Fairlie's niece, and Marian Halcombe, her devoted half-sister. Walter realises that Laura bears an astonishing resemblance to the woman in white, who is known to the household by the name of Anne Catherick, a mentally disabled child who formerly lived near Limmeridge and was devoted to Laura's mother, who first dressed her in white.

Over the next few months, Walter and Laura fall in love, despite Laura's betrothal to Sir Percival Glyde, Baronet. Upon realising this, Marian advises Walter to leave Limmeridge. Laura receives an anonymous letter warning her against marrying Glyde. Walter deduces that Anne has sent the letter and encounters her again in Cumberland; he becomes convinced that Glyde originally placed Anne in the asylum. Despite the misgivings of the family lawyer over the financial terms of the marriage settlement, which will give the entirety of Laura's fortune to Glyde if she dies without leaving an heir, and Laura's confession that she loves another man, Laura and Glyde marry in December 1849 and travel to Italy for six months. Concurrently, Walter joins an expedition to Honduras.

After six months, Sir Percival and Lady Glyde return to his house, Blackwater Park in Hampshire; accompanied by Glyde's friend, Count Fosco (married to Laura's aunt). Marian, at Laura's request, resides at Blackwater and learns that Glyde is in financial difficulties. Glyde attempts to bully Laura into signing a document that would allow him to use her marriage settlement of £20,000, which Laura refuses to do. Anne, who is now terminally ill, travels to Blackwater Park and contacts Laura, saying that she holds a secret that will ruin Glyde's life. Before she can disclose the secret, Glyde discovers their communication, and believing Laura knows his secret, becomes extremely paranoid and attempts to keep her held at Blackwater. With the problem of Laura's refusal to give away her fortune and Anne's knowledge of his secret, Fosco conspires to use the resemblance between Laura and Anne to exchange their two identities. Sir Percival and Fosco will trick both individuals into travelling with them to London; Laura will be placed in an asylum under the identity of Anne, and Anne will be buried under the identity of Laura upon her imminent death. Marian overhears enough of the plan to understand they are conspiring against someone's life but not any of the details, but becomes soaked by rain in her hiding place and falls ill."