Set in Washington, D.C., the series follows K.C. Cooper, a high school math genius, who gets recruited by her parents after she discovers that they are secretly undercover spies working for an agency called The Organization. Her brother tries to help because he feels left out and eventually joins the team, and his desire leads his mother and father to get a new robot child. Each episode centers on K.C. and her family as they contend with common familial issues while also performing missions to save the country, with a recurring storyline involving thwarting the plans of a criminal organization.