The episode begins with Little Bill drawing a picture of April playing basketball. He pretends that April is playing a game and she just won the game for the team. Little Bill shows Alice the Great the picture and Alice the Great thinks that the picture looks very nice. Little Bill asks Alice the Great if April's basketball team won today. Alice the Great says that they won't know until April gets home. Little Bill notes that the team always wins. The door opens and Alice the Great thinks that April is home now. Alice the Great and Little Bill walk out to show April the picture he drew of her winning the basketball game. April doesn't look happy and she walks upstairs without talking to him. Little Bill asks Brenda what's wrong with April. Brenda tells Little Bill that April is upset because the team lost the basketball game. Little Bill is sad to hear that they lost. Brenda says that April missed an important shot and feels awful about it. Little Bill notes that April is the best basketball player in the world. Big Bill thinks that the drawing is wonderful and tells Little Bill that April will want it when she's feeling better. Brenda suggests that he save it for her. Little Bill says that he's going to go cheer April up. Little Bill walks into April's room to see her laying on the bed. Little Bill tells April that he brought her something to cheer her up. April tells Little Bill that she doesn't want the picture. Little Bill is sad that she doesn't want the picture. April states that she doesn't want to have anything to do with baseball ever again. Little Bill can't believe what she's saying. April asks Little Bill not to say the word basketball ever again. Little Bill tells April that he wants to cheer her up. April doesn't think that anything could cheer her up. Little Bill thinks that he can and starts to do a dance for April saying that she is the best at basketball. Little Bill realizes that he said basketball. April tells Little Bill to go away. Little Bill agrees. When Little Bill leaves, April takes her trashcan outside of her room and throws away her basketball and her trophy. Little Bill tries to talk with April. Bobby tells Little Bill that he wouldn't do that if he was him. Little Bill gives up and goes into Bobby's room. He asks Bobby why April would throw out her basketball and trophy. Bobby says that is a bad sign. Little Bill notes that April also said that nothing would cheer her up. He asks Bobby if April is mad at him. Bobby says he doesn't think so and says that April is only mad at herself. He notes that April really wanted to win that game. He tells Little Bill that the best thing they can do for April right now is leave her alone. Little Bill asks Bobby if April will stay like that forever. Bobby promises Little Bill that she won't. Little Bill is determined to make April feel better. Bobby tells him not to say he didn't warn him. Little Bill walks back to April's room. Alice the Great sees Little Bill and tells him to come into her room. She notes that he won't do April any good by just staring at her door. Little Bill shows Alice the Great that April threw away her basketball and her trophy. He also notes that April doesn't want to hear the word, basketball, in the house. Alice the Great says that April is feeling very sad right now. Little Bill wishes that she could make April happy right now. Alice the Great asks Little Bill about the things that make him happy. Little Bill says that he likes birthdays. He notes that on his birthdays he gets presents, ice cream, and cake. He imagines that it's his birthday and he's surrounded by presents and a cake. He opens up a gift and inside is April's trophy. He starts to cheer. Little Bill is snapped out of his imagination by Alice the Great telling Little Bill to be careful with April's trophy. Little Bill says that they should throw April a birthday party. Alice the Great notes that it isn't April's birthday. Little Bill says that they should throw her a not-birthday party. Alice the Great laughs and says it's a wonderful idea. Little Bill runs into the room and tells Bobby that they are going to have a not-birthday party for April. Bobby is confused. Little Bill says that it is a party that will hopefully cheer April up. Little Bill says that it's a surprise. Bobby doesn't think it makes any sense. Little Bill insists that it'll be fun and Bobby can help him. Bobby agrees to help out. Little Bill and Bobby sneak past April's door and they go downstairs. In the kitchen, Little Bill and Bobby tell their parents about the not-birthday party. Big Bill and Brenda are confused. Little Bill says that they should get not-birthday gifts, cake, and ice cream. Big Bill thinks he'll make pizza for dinner tonight because it's April's favorite. Little Bill tells Big Bill to put pineapple on it. Big Bill thinks that's a good idea. Little Bill notes that April loves pineapple on her pizza and asks if Big Bill can make it tonight. Big Bill says that he can. Everyone is happy. Little Bill asks Brenda if they can put birthday candles on it. Brenda says that she has some leftover ones. Little Bill thinks they should put them on the pizza like a birthday cake. Bobby asks about decorations. Brenda says that they have decorations in the party box. Big Bill asks for Bobby's help with the pizza dough. Little Bill tries to think about a not-birthday present for April. Later that night, Little Bill goes into April's room. April tells him that she wants to be alone. Little Bill tells her that it's dinner time. April tells Little Bill to tell everyone that she's not hungry. Little Bill knocks again and runs downstairs. April comes out and Little Bill starts to laugh. April asks him what he's doing. Little Bill laughs and runs down the stairs. April tells Little Bill to quit being weird and follows him down the stairs. Little Bill peeks around the corner and laughs again. April yells that Little Bill is being weird. She notices that everyone is missing. April walks outside to find balloons, party decorations, the pizza, and everyone outside. They wish April a happy not-birthday. April comes out and everyone starts to sing. April laughs and notes that Little Bill tricked her. Little Bill tells April to blow out the candles. She does and everyone claps. Big Bill asks April if she's ready for her presents. April can't believe that there are presents. Little Bill pulls out a present and April knows what it is. It's her trophy. April thanks Little Bill for not throwing it away. Little Bill gives her another present and it's April's basketball. Little Bill notes that April said basketball. April thanks everyone and asks them why they're having the party. She notes she lost the game. Brenda tells April that they will always be proud of her no matter what. Big Bill says that she'll always be a champion to them. Alice the Great tells April that Little Bill wanted to do something special for her. Bobby notes that he wanted to cheer her up. Little Bill asks April if she is cheered up. April says she is and kisses Little Bill on the cheek. Big Bill asks everyone if they want some pizza. Everyone says yes and the episode ends with everyone eating some pizza. Later that night, Little Bill has April's basketball. He notes that April let him borrow it. Little Bill says that the basketball is important to April. He says that some things that is important to him are elephants, hamsters, going to the park, birthdays, and many other things. He asks them if they've ever had a not-birthday party before. He starts to sing the Happy Not-Birthday song. Alice the Great calls into the room and asks Little Bill who he's talking to. Little Bill chuckles and the episode ends with him playing with the basketball.