The story opens with a very tranquil scene. We see a woman, who is six months pregnant, waiting in anticipation for her husband to come home. She deeply loves her husband and when he arrives she is excited to see him. She rushes around, happy to fix him a drink, and tells him if he too tired she will just cook dinner for him at home instead of going out. The mood then shifts drastically when her husband, Patrick, a police detective, tells her some shocking news. We the reader are not privy to what he has to tell her, but by her reaction we know it is bad news for her. She is in shock and almost goes into a trance, and then decides to cook dinner. She goes and gets a leg of lamb from the freezer, and uses that to kill her husband, then cooks the lamb.
We see that there are many moods in the short story: first we see a happy mood, then it shifts to a mysterious mood. As the other police officers come to investigate the murder, the mood shifts again, to a mood of being almost sadistic. As the police officers are eating the leg of lamb, they are talking about trying to find the murder weapon, while the whole time, they are eating the murder weapon. The story shifts to the wife, in the other room, listening to the police, and she starts to laugh to herself.