A 19-year-old girl named Alice, now on the cusp of adulthood, finds herself disillusioned with her life's expected trajectory. At a garden party thrown for her engagement to a dull suitor, she is suddenly distracted by the sight of a peculiar rabbit wearing a waistcoat, which no one else seems to notice. Drawn away from the party and following this rabbit down a hole, Alice tumbles into a realm both familiar and strange to her. This is Underland, a place of fantastical creatures and wonders, which Alice had previously visited as a child and named "Wonderland," though she has since dismissed those adventures as mere dreams.

Upon arrival, Alice encounters an array of bizarre and colorful inhabitants, including Tweedledee and Tweedledum, the Dormouse, the Caterpillar, and the Cheshire Cat. Each resident of Underland reveals that the land is under the despotic rule of the Red Queen, who maintains power through fear and cruelty. The creatures believe Alice is the prophesied champion mentioned in an ancient Oraculum who will end the Red Queen's reign. At the same time, Alice believes she is simply experiencing a vivid dream. The White Rabbit insists that she must slay the Red Queen's fearsome guardian, the Jabberwocky, a task for which she feels dreadfully unprepared. Alice's initial reluctance to accept her identity as the champion, and her journey towards self-discovery, are interwoven with the politics and power struggles of Underland.