Three Boy Scouts—Ben, Carter, and Augie—find their long-standing friendship at a crossroads as they prepare for one last camping trip, a tradition they have upheld despite growing apart. Ben, the group's most conscientious member, is torn between loyalty to his friends and the desire to move on with his high school life. Carter pushes for a wilder night out, sneaking into a secret high school party instead. Meanwhile, Augie remains deeply committed to scouting, unaware of the shifting dynamics. Their plans take an unexpected turn when they discover their town has been overrun by a horde of ravenous zombies.

The trio reluctantly teams up with Denise, a resourceful cocktail waitress, who provides them with crucial survival skills and weapons. Through a series of intense and sometimes comical encounters, they utilize their scouting knowledge to navigate the chaotic streets and protect themselves. As the night progresses, the group faces mounting dangers and uncovers startling truths about the outbreak. Sticking together despite their differences, they embark on a mission to save their loved ones and the remaining townsfolk from the escalating threat.