With Plays Unpleasant, Shaw challenged his audiences' moral complacency. In Widower's Houses, Harry Trench is engaged to brisk Blanche Sartorius. When he realises that her father is a slum landlord, Harry questions whether he and Blanch have a future together. In The Philanderer, charismatic Leonard Charteris proposes marriage to Grace, while still involved with the beautiful Julia Craven. But Julia is not inclined to surrender him so easily.