Saving hundreds of rats from the dissecting knife is only the start of the Green Guerrillas campaign. Their leader is Tess Robertson, a genius at fighting environmental pollution and injustice - and equally brilliant at fighting with friends and family at the same time. Now Tess is planning her biggest battle yet. She has to stop a billion dollar paper mill from being set up in town, and pumping dioxin, one of the world's most toxic pollutants, into the air.