Dave (Alexander England), a washed-up musician, volunteers to chaperone his nephew's kindergarten field trip after taking a shine to the plucky schoolteacher, Miss Caroline (Lupita Nyong'o). Dave's intentions are complicated by the presence of world famous children's entertainer and competitor for Miss Caroline's affections, Teddy McGiggle (Josh Gad). One thing none of them bargained for, however, is a sudden zombie outbreak, from which Dave and Miss Caroline must protect the children.