Rebecca unexpectedly finds herself back at Trebizon in the summer holidays with the rest of her friends, helping at a camp for city children in the school grounds. She and Sally [Elf] Elphinstone are put in charge of the worst behaved kid on the camp. Looking after little Tommy Carter provides plenty of drama and when he becomes involved with an important excavation for Roman coins in nearby Mulberry Cove, Rebecca and Elf find themselves at the centre of thre biggest drama of all.

Book 7 in the classic school series.