When a mysterious cosmic event suddenly tears Oak Street from its suburban surroundings and transports the entire neighborhood to an unknown world, the Platt family finds themselves trapped in a strange and dangerous new reality. With no idea where they are or how to get home, they must put aside their differences and work together to survive. As they venture beyond the familiar streets and discover that their new surroundings are filled with prehistoric dangers, the family is forced to confront both the terrifying unknown outside and the tensions within their own home.