What was supposed to be a normal Monday assembly turns into a nightmare when students at Saint Aurelius High School discover their teachers have become violent, bloodthirsty zombies. Trapped inside a locked-down school, Iris and her chaotic group of friends must fight to survive while uncovering the horrifying truth behind a mysterious homemade drink known as Black Sap. As the infection spreads across the state of Velmorra, the group journeys through abandoned highways, collapsing cities, dangerous survivor factions, and terrifying infected creatures in hopes of reaching the last safe state: Eldraine. But surviving zombies may not be the hardest part. Because some humans are far more dangerous.