Carina has just enrolled her son at Eureka Day School, where all decisions are made by consensus— diversity and inclusion are valued, and vaccinations are a personal matter. As a new member of the Eureka Day’s board of directors—one position is always reserved for a new parent so no one gets too comfortable—she is thrown into the deep end when a mumps outbreak hits the school, forcing parents to choose between their own personal beliefs and what might be best for the community.