After the finale of season 3, the fire almost destroys the school and leads the fate of some teachers and students to uncertainty. The center of season 4 is the Kelly family a.k.a the "family from hell" with an alcoholic mother Rose Kelly and her five children who all enroll at Waterloo Road and bring much trouble along with them. Besides, the series also mentions about taboo issues such as steroids, giving birth and smuggling among pupils and teachers of this school.