Darrell seeks Jo's and Felicity's help to reveal Lily's plans before Malory Towers is lost forever. Gwen learns Ron is leaving and is forced to confront her own future.

Gwen is furious with her father when he tells her she won't be going to finishing school. Meanwhile, a mysterious will throws the future of the school into doubt.

Smoke from an abandoned cottage leads Lily to an old, and dangerous, friend. Alicia takes on the challenge of helping Darrell relax and plans a midnight feast.

When Felicity and June are forced to stay in the san, Felicity sees a mysterious girl in uniform sneaking around the school.

The girls make a film in an effort to prove Lily is a good teacher. But Lily has her own agenda, and at the peak of filming, things go terribly awry.

Jean reveals uncomfortable truths about the Grayling family, shocking Lily and stirring up trouble. Meanwhile, Darrell and Alicia attempt the ultimate prank.

Bill's mother puts Thunder up for sale, and Bill attempts a desperate ploy to foil her. The third formers prank Miss Vernon, but she brings in reinforcements.

Gwen plots for movie star, and Miss Grayling's cousin, Lily Vernon to visit the school, unaware of their family feud. Meanwhile, Susan and Nancy devise a plan to get out of eating carrots.

When Clarissa's brother insults her, she challenges his team of boys to a lacrosse match. And Mr. Parker worries about Nancy when she is put in goal.

Gwen's plans to go to finishing school are thrown into chaos when an unexpected obstacle gets in her way. A spelling bee causes Darrell to doubt her future plans and strains her relationship with Felicity.