Angelina thinks that Miss Lilly is going to marry Ivor Operatski. While trying to stop the proposal, she nearly gets him drowned. Miss Lilly then reveals that Angelina is the leading bridesmaid for Ivor Operatski's new dance.

William is prompted by his father to star as a magician for a charity event. When he practices the disappearing trick on Angelina, he and Henry believe that she has disappeared for real. Angelina shows up in time to begin her performance with William Longtail.

A 300-year-old oak tree has meant a lot to Angelina and her friends. When Priscilla Pinkpaws breaks her left arm from falling out of the tree, Mrs. Pinkpaws insists that the tree has to be removed forever. In response, Angelina and her friends attempt to save it, but by the last minute, the tree collapses by itself before becoming a wooden playground.

Angelina and her friends start up a film based on Thomasina Tuttle, using Doctor Tuttle's video camera. Angelina becomes bossy, then falls down a hole. Her friends rescue her—all the while filming, which wins them an award.

With no holiday available, Angelina works with her father at the press. She gets into the reporter business and after some effort, she picks up a scoop from the opera singer Maria Mozzarella.

Angelina has to bring Polly to Miss Lilly's dance party. Angelina takes her mother's silver locket without asking her. She then loses the necklace and fails to find it. She is on the verge of confessing, when she finds that Polly had the silver locket all along.

Angelina wants Miss Lilly to be dedicated as Mouse of the Year. Miss Lilly gets so preoccupied with preparations for the award, that her dance class is in disarray. Miss Lilly turns down the award for her class' sake and Angelina feels upset about it.

Henry spots what he thinks is The Chipping Cheddar Witch. Henry and William follow the witch, then Henry winds up with a few mishaps frightening Angelina and Alice and they all realize the witch is actually Miss Lilly.

Anya comes for a visit as she wants to stay in Angelina's cottage. Angelina soon becomes jealous of Anya as she is getting better attention. She then snaps at her and Anya stays away from her. Eventually the duo get together again and enjoy themselves.

Angelina brings Polly to school for her Show and Tell with Ms. Chalk. But on her way into class, Angelina loses Polly and she begins to worry. However, Sammy Watts manages to find Polly for Angelina just in time for Show and Tell.

William wants to be part of Sammy's club. He gains acceptance when Sammy is in need of a new trolley from Mr. Longtail. He ends up letting Angelina and Miss Lilly down, but his and Sammy's lot make up for it.

Tomorrow is Angelina's grandparents 50th wedding anniversary. Grandma is unhappy that her husband is going to forget the event. Angelina tries to sort it out, but she ends up neglecting her dance practice. However, Grandpa has a nice surprise for his wife, Sophia.