Three teenage Victorian-era heroines from literature--Wendy Darling, Dorothy Gale, and Alice Liddell--meet at a special boarding school called Cheshire Crossing, operated by Dr. Ernest Rutherford, where they are supposed to learn how to harness their magical powers and defeat the villains that threaten their respective fantasy lands. Not content to sit in classrooms, the three begin traversing back and forth across universes, with devastating results. They must then rely on a team of unlikely allies to set things right.