Fantomina; or Love in a Maze is a novel by Eliza Haywood published in 1725. In it, the protagonist disguises herself as four different women in her efforts to understand how a man may interact with each individual persona. Part of the tradition of amatory fiction is to rewrite the story of the persecuted maiden into a story of feminine power and sexual desire.
The story opens in a playhouse in London where the unnamed main character, intrigued by the men at the theater and the attention they pay to the prostitutes there, decides to pretend being a prostitute herself. Disguised, she especially enjoys talking with Beauplaisir, whom she has encountered before, though previously constrained by her social status's formalities. He, not recognizing her, and believing her favors to be for sale, asks to meet her. She demurs and puts him off until the next evening.
In preparation, she rents lodgings and then meets him at the theater the following night. They go to the house and have dinner. Meanwhile the protagonist realizes that Beauplaisir wants to have sex and she tries to resist him and telling him being a virgin, but he is too aroused and does not listen to her protests, and rapes her.
Afterwards, she is despondent and rejects his money, which confuses Beauplaisir, who did not believe her protestations being serious. Worried about her reputation, she gives her name as "Fantomina".
Soon, however, Beauplaisir tires of her and leaves for Bath. Though she continues to employ the ruse of "Fantomina" throughout the story, the protagonist drops this alias for a short time to pursue Beauplaisir to Bath. Dressed as a country maid, she obtains employment at the inn where he is staying, taking the name Celia. When Beauplaisir sees her, he believes her to be a new maid, and makes romantic overtures. The protagonist plots this encounter carefully and Beauplaisir's every reaction is drawn from him by her manipulation, but the lover believes he has ravished her in spite of some protest on her part. He gives her some money in recompense.
He leaves Bath after about a month, tired of Celia. On his way home, he encounters Mrs. Bloomer, who is the protagonist dressed as a widow, and invites her into his carriage. Her grief prompts him to try to raise her spirits, which results in them having sex in an inn along the way.
When this identity again begins to lose favor with him, the heroine sends Beauplaisir a letter, signed "Incognita," declaring her undying love and passion for him. She writes there is nothing she will refuse him, except the sight of her face. They meet and she, wearing a mask, agrees to sleep with him in the dark. Beauplaisir keeps up each of these affairs, never realizing they are the same woman. The protagonist becomes pregnant and after she gives birth her mother insists she name the father. When Beauplaisir arrives, he does not know who she is until she tells her story in full. At the end, her mother sends her to live in a monastery in France.