George is appearing on a gameshow. Arthur forgets his class report on Michelangelo to help the class get the 15 merit points to get his class a No Homework Day. Pal and Kate try to get it to the school.
When picking out a tie for a clarinet recital, Binky holds his mom's hand. George sees it, and Binky tells him not to tell anybody. The Tough Customers, in the meanwhile, are trying to find out what Binky's secret is.
After seeing an advertisement for a "Dark Buggy" on TV and bringing it to school, Buster accidentally gets the wayward electronic toy car lost in the teacher's lounge, so he tries to find a way to get it back with help from Binky.
The third grade students at Lakewood Elementary are stressing about their upcoming S.W.E.A.T aptitude tests, including Sue Ellen, who panics that she doesn't have any #2 HB pencils, and Brain who worries that he will do bad when he accidentally skips a question on the practice test.
Arthur and Prunella are assigned to work together for the upoming Earth Day fair at school, but Arthur learns that Prunella has kept several beloved items (including an old sock and birthday cards) over the years and they have been piling up in her closet. While Arthur and Rubella try to help Prunella learn to let go, she resists and still tries to save what she can.
After Binky gets Muffy in trouble for using her cell phone in class, Muffy learns that his real name is Shelley, and threatens to use this information as revenge against Binky. Binky is upset at first (because his parents never told him Shelley was his real name), until his mother tells him about how his great grandfather, Shelley Barnes, saved the circus.
Mrs. Read's new client has a daughter D.W.'s age. However, D.W. and W.D. are complete opposites and don't get along. After learning that the family has been invited to spend the week at W.D.'s house, the two girls come up with a plan to cut the visit short.
Fritz injures his ankle while staying at Shady Pines Retirement Home and asks Buster to takes over. He finds out that it is a big responsibility, but he can handle it. All is going well until he finds out that him and his mother Bitzi are going camping.
Grandpa Dave is moving closer to the family and the kids are thrilled. But something isn't quite right; he's forgetting all sorts of things. Joan Rivers, reprising her role as Francine's grandmother, is on hand to help the kids understand that Grandpa Dave loves them just as much as he always has, even if he has trouble with his memory.
Muffy, Arthur and Buster are carpooling to their cooking class. Buster wants this to be the best car pool ever, but his rolling party on wheels turns into a disaster. Can the kids stop fighting long enough to see the sights right in front of them?