At the beginning of Karen M. Mcmanus’ novel One of Us is Lying, a group of students are in detention. These students are all in detention for the same reason. One student, in particular, is allergic to peanuts. This student’s name is Simon. Simon gets a cup and fills it with the faucet water offered in the classroom. Almost immediately, Simon hits the ground. He’s turning blue and is in an obvious state of distress. Simon ends up passing away and everyone is confused. How did peanut products end up in Simon’s water?