Willie returns from the front to Dublin Castle and is so changed that at first he is not recognised. He is greeted happily by Dolly and Maud, but Annie speaks to him sharply about soldiers who supply rebels with guns: she can barely hide her anger. James Dunne returns home. Willie does not expect the belligerence and cold fury that he is met with by his father. The policeman speaks angrily of the death of one of his recruits at the hands of the rebels, his anger at his son’s letter and speaks of his own responsibility and authority. Willie is conciliatory but his father launches a bitter diatribe about his son’s treacherous betrayal of all he stands for. Willie leaves the apartments and goes out into the night.
He makes his way to Gretta’s home in the slums. The thought of Gretta sustains him in his misery and he decides to ask her to marry him. When he reaches Gretta’s room, however, he finds her nursing a baby. Gretta tells Willie the child is her own: she has married. She tells him that she wrote a letter to him which had had no reply— a letter prompted by the earlier letter she had received from one of Willie’s friends. Willie feels dread as she explains that she knows about his encounter with the prostitute in Amiens. He reads the letter anonymously sent to Gretta, then makes a sad confession and apology to her. Gretta cries. The two manage a kind of heartfelt understanding before Willie leaves: Willie admits to the truth of Gretta’s father’s criticism, that he did not know his own mind.
Willie leaves in misery, and spends the night in a dosshouse.