The characters are the fake Charles, Laurie, Laurie's family, and Laurie's teacher. The setting is in the past, and the story takes place at Laurie's house and his school.
The initiating event is when Laurie doesn't stop at the curb to wave at Laurie's mother. The mother is getting the first signs that something is up.
Charles, who is really Laurie, hits the teacher.
The fake Charles(Laurie) hits an innocent Kindergartner with a seesaw.
Laurie reforms. This means that he acts innocent when really he is just plotting. He even tells his family that he(Charles) is being good and is helping the teacher.
Laurie's Mom goes to the PTA meeting at the school to try to meet Charles's Mom. The story ends when Laurie's teacher tells Laurie's Mom that Charles is fake, and that Laurie was the one causing the trouble all along.