The seven Knight sisters helped their widowed mother to run the Oakfield Hotel. Their mother married again, and while the parents were away on honeymoon, the girls’ new step-brother, Simon, arrived, bringing problems.
Miss Baggott a snobbish teacher at Greystones School, wants the Honourable Daphne Coote to be elected President (as the school captain is called) and arranges for Polly Rogers, a quiet, studious girl, to be the other candidate. Miss Baggott is sure Polly won’t be elected, but Tess Hardy, Polly’s lively friend, starts a brisk election campaign.
Jessie Halliplunk, a coalman’s daughter, is being educated at a famous girls’ school at the wish of a distant wealthy relative, Lord Halliope-Plunkett. At first, Jessie does not fit in too well, but after proving to be a first – class rider, she wins the girls approval—except for Cynthia, the former riding champion! Cynthia sends a telegram on the day of the riding championship final that sends Jessie hurrying home, thinking her father is ill.
Rita, Georgina Mary and Priscilla were four girls who bumped into each other by chance and discovered a common interest – music. They joined forces to form a band.
Maddie Hatter was spy mad and Hazel Harris was delighted when she came to St Hilda’s school. But Hazel thought Maddie had gone too far when she accused Miss Gaunt the PE mistress of being an agent and vowed to foil Miss Gaunt’s plans.
The girls at Pringle’s Private School are all daughters of wealthy parents. Not one of them has any interest in school work and their laziness has caused them to be expelled from one school after another. They should have been expelled from Pringle’s as well, but the Headmistress thinks it will be better if the staff leave instead. By arranging seemingly innocent incidents, she is teaching them to take care of themselves.
Terry Marsden accidentally launches herself into the future in a strange craft and finds herself a thousand years from now in Tibet, now called Nirvan, where she is befriended by Tishani, the leader’s daughter. Terry learns that, back in her own time, a terrible flood is going to devastate the east coast of Britain. She must return to warn of the disaster, but the time ship is taken by Lishan, an unscrupulous historian, who forces the girls to travel through time with him.
Mary Martinand her brother, John, make a pet of a stranded dolphin, Finny, and teach him to do tricks. But Finny is taken by Sam Barker, a showman, as the star attraction of his oceanarium. Mary and John go to the show-ground at night to feed Finny and are caught by Bruton Finny’s cruel trainer. Barker blackmails Mary to become Finny’s trainer as Burton has not had success in making him do tricks.
Professor Doyle, takes his family on a special holiday in the Neptume and underseas exploration ship. His adventurous daughter, Rita is excited but his other daughter Pauline is a bit more nervous. When Rita calls her a baby, Pauline is determined to show she’s not scared.
Pearl Crystal and her friend Tessie O’Day are police cadets in the town of Chemsford. In the course of duty they are given a variety of jobs.
