When Madness Brings Wonder (Alice Kingsleigh/The Mad Hatter x OC)

Benjamin Vacher is a 20-year-old mindful and dependable American Victorian rich man who is close childhood friends with 19-year-old Alice Kingsleigh. During the time of their childhood, they have once been to a fantasy world called Underland they mistakenly call "Wonderland". Unlike Alice, Benjamin never forgets their visit while they grow up, yet he keeps his memory a secret from everyone except his relentless and optimistic younger sister Sophia. He even has feelings for Alice that grow stronger over the years, something Sophia deeply supports due to being Alice's best friend since they were children.

13 years after the night they slept over at the Kingsleigh's house, the Vacher siblings attend a party at the Ascots' estate with their parents where they reunite with Alice, who is happy to see them again. Both of them find out that the event is an engagement party for Alice and Hamish, much to Benjamin's secret dismay. When Hamish proposes to Alice, she and the Vacher siblings left the party to follow a white rabbit in a waistcoat to a rabbit hole. Once they accidentally fall down the hole, they enter Underland, which Benjamin remembers while Alice does not. Even Sophia is fascinated with the world and its residents. The trio learn that Alice is destined to slay the Jabberwocky of the Red Queen, but she cannot do it and believes she is dreaming. Along the way, they meet the Mad Hatter, who becomes attracted by Sophia's unique personality.

Will the trio of friends help save Underland from the Red Queen? Can Benjamin admit his feelings to Alice despite selflessly putting them aside for her happiness? And regardless of coming to Underland for the first time, what will happen when Sophia finds herself growing closer to the Mad Hatter?