 In Adelaide, the wife of Dr. Brian Cowper, Jill Cowper, is developing her thesis at home to finish her Master in Anthropology. When the plumber Max unexpectedly arrives for a routine check and maintenance of the piping in the bathroom, Jill stays alone at home with the talkative weird stranger. Along the days, he tells that he spent some time in prison, making Jill frightened with his presence. Her friend Meg, her husband Brian and the super s wife finds Max a simple, but nice man, but Jill does not agree. When there is a problem in her bathroom and Max needs to stay with her for a longer period, the tension between them increases and Jill finds a way to get rid off the plumber.