It's April Fool's Day, and the Wakefield twins are about to play their biggest and best trick ever. Usually Elizabeth and Jessica pretend to be each other. But this year they won't switch identities - everybody will just think they did.
When April 1 comes, the twins' trick works perfectly - too perfectly for Elizabeth. Everyone believes she is Jessica pretending to be Elizabeth. And being Jessica always means getting into trouble. By the end of the day, Elizabeth is beginning to wonder whether she is the biggest April Fool of all for agreeing to be part of this charade.
Elizabeth picked up her books and went to the door. Now she was really in bad shape. She had two things to do this afternoon - Mr. Davis's detention and decorating the gym. How was she going to manage both? And how was she going to handle the Unicorns? If Lila Fowler had her way, Elizabeth would be doing the special job they'd been saving up for Jessica. What a mess! And it was all because of the past success of their great April Fools' Day joke. Now, no matter how many times she told the truth, everybody still insisted that she was Jessica pretending to be Elizabeth!