Felicity struggles to get out of Darrell's shadow in her second year at Malory Towers. Newcomer Jo struggles to follow the rules, getting Felicity caught in the crosshairs. Mary Lou debates how strict to be after becoming head of lower school.

June leads the second form girls in a strike to protect Clarissa from Gwen's constant demands, resulting in a big change. When a pipe bursts, old memories resurface and a new friend is made. Archaeological research begins at Malory Towers.

Clarissa goes undercover to prove that girls can play soccer just as good as boys. Darrell and Susan help Mr. Murray look for ancient symbols in the garden as they continue their archaeology research.

Jo and Connie trick Felicity into helping them retrieve Jo's confiscated pocket money from Matron's safe. The Second Form girls protest Jo's rule-breaking.

Afraid of being accused of stealing, Jo and Connie run away to the village. Darrell helps a worried Ruth search for her sister. When the girls return to Malory Towers, Jo's father learns about her misdeeds.

Gwen has plans with Ron, but gets stuck watching Mr. Parker's baby. Alicia recruits Felicity to the cross-country team, much to Darrell's dismay. When baby Kathleen goes missing, Gwen attempts to pass off the blame.

June pulls a daring stunt to save the beloved Malory Oak from being chopped down by Mr. Murray. The Second Form girls learn about chores and hard work. Jo trusts Felicity and Connie with a secret about her mother.

Mrs. Heather appears suddenly to take Susan home. The Second Form girls start a prank war with Mam'zelle. Ruth and Clarissa find a way for Susan to stay at Malory Towers.

On the day of the big race, Felicity cracks under the pressure of Alicia's tough coaching. Matron goes on vacation to see her family. The new nurse, Nurse Jane, has her hands full right away when Darrell gets injured looking for Felicity.