Lawyer Dave Crabtree's troubles begin with the purchase of a decrepit 1928 Porter that claims through the radio to be his mother. Wife, Barbara doesn't want the old wreck but it has an overwhelming appeal for Captain Manzini, a very persistent antique car collector.

Dave fears for his mother's safety when car strippers are reported in the neighborhood.

Captain Manzini goads Dave into racing the car against England's foremost distance walker with Mother as the stakes.

Dave's mother is tired of spending night after night in a dark garage so she tries to get Dave to by her a TV set.

After being married for 8 years, Barbara and Dave decide to go on a honeymoon. However, Barbara's mother, an astrology nut, warns them of impending danger.

Captain Manzini offers Dave one last chance to sell his antique car before using a molecular compressor to shrink it to the size of a small toy.