9-year-old girl Phoebe (Elle Fanning) joins the school drama group and plays the protagonist Alice in Alice's Adventures in Wonderland. Drama teacher Miss Dougall (Patricia Clarkson) praises Phoebe. But Phoebe outside the drama group has many problems. She repeatedly gets into trouble for spitting at classmates and being unable to control her behavior. Phoebe's mother Hilary (Felicity Huffman) refuses to admit that Phoebe suffers from obsessive-compulsive neurosis. Faced with multiple pressures, Hilary and her husband Pete (Bill Pullman) frequently escalate conflicts. At the same time, Phoebe's symptoms are getting worse and worse, and the boundaries between illusions and reality in her mind are becoming more and more blurred, and the school is also dissatisfied with Miss Dougall's educational methods for children. Can the carefully rehearsed Alice's Adventures in Wonderland finally be released?