When straight-laced fire superintendent Jake Carson and his elite team of expert firefighters come to the rescue of three siblings in the path of an encroaching wildfire, they quickly realize that no amount of training could prepare them for their most challenging job yet: babysitters. Unable to locate the children's parents, the firefighters have their lives, jobs, and even their fire depot turned upside down and quickly learn that kids, much like fires, are wild and unpredictable.