Alex Rose and Nancy Kendricks are a young, professional, New York couple in search of their dream home. When they finally find the perfect Brooklyn brownstone they are giddy with anticipation. The duplex is a dream come true, complete with multiple fireplaces, except for one thing: Mrs. Connelly, the old lady who lives on the rent-controlled top floor. Assuming she is elderly and ill, they take the apartment. However, they soon realize that Mrs. Connelly is in fact an energetic senior who enjoys watching her television at top volume day in and day out and rehearsing in a brass band. As a writer, Alex is attempting to finish his novel against a looming deadline. However, he is interrupted daily by Mrs. Connelly's numerous demands and requests, and what begins as a nuisance quickly escalates into an all-out war.