The Heelers are called to the site of a demonstration against a proposed resort development in Widgeree. While they manage to allay the demonstrators' activities, emotions run high when the owners of the proposed development find themselves at a ""Murder Mystery"" weekend with the head of the demonstrators. The tension heightens with Maggie also attending the weekend for the hospital's Children's Wing charity, with PJ.    As the plot of the Murder Mystery Weekend unravels so does the fabric of a number of the players' lives. The head of the development is attacked in the cellar of the Imperial and the site is vandalised. This leads to an investigation that brings the development's viability into question. The Heelers must discover whether it was the demonstrators who damaged the site or if there are others with a more complex motive. PJ is confronted by his past. There is something naggingly familiar about the game's coordinator. PJ discovers he was the informer that disappeared before c.