Francine is mad at Arthur for a joke he made at her expense, and Mr. Ratburn assigns them to work together on a project. They go to the library together and lose track of time, getting locked inside when the library closes. As they try to find a way out, Francine and Arthur must put aside their grudges and learn to work together. Arthur is in charge of helping the cafeteria lady, Mrs. MacGrady, with a fundraiser, but when he tries to give the money he raised to her, she is distracted by a phone conversation, so Arthur leaves the money in the kitchen. However, the money disappears and Arthur is falsely accused of stealing it. Buster, acting as a detective, tries to prove Arthur's innocence.