During the half-term, Tucker and Benny start work for Alan's father and by accident discover that someone is stealing valuable building materials from him.

Susi joins the lunchtime judo class to give herself a break from school work, but runs into trouble with one of the school bullies.

The first trip to the Outdoor Centre ends abruptly when Cathy and Trisha ignore a warning that some parts of the building are unsafe.

Trisha continues to organise resistance against the Colditz conditions imposed on the school to combat vandalism.