The Elsworth Worm is a dragon, a monster of village legend. In the sequel to Room 13, Fliss and her class are chosen to re-enact the legend for the village Festival, and sinister events start to unfold. Four friends playing the part of the Worm begin to behave strangely and a sudden crime-wave hits the village. Fliss Morgan must find the courage to face another force of evil and this time she will be alone.