Helen Hayes portrays the resolute "Mrs. Steinmetz," who refuses to relinquish her so-called “firetrap” residence despite pressure from the wealthy mall developer "Hawk" (Keenan Wynn). Fortunately, she has "Nicole" (Stefanie Powers) assisting her—who becomes particularly valuable when "Hawk" dispatches his easily manipulated nephew "Willoughby" (Ken Berry) in an attempt to persuade the elderly woman to leave. It turns…

Tennessee Steinmetz’ aunt, portrayed by Helen Hayes, now possesses Herbie and resides within a San Francisco firehouse. A wealthy property developer (Keenan Wynn) has his sights set on her land for a large development but she refuses to relinquish it. He dispatches his inexperienced lawyer nephew (Ken Berry) in an attempt to convince her, only for the nephew to switch allegiances after encountering her former neighbo…