Jonathan Haze stars as clumsy assistant florist Seymour, who saves his job in Mr. Mushnik's skid-row flower shop when he brings in a unique man-eating plant. The problem is, it's a very hungry plant; every night it opens its huge jaws and demands to be fed, forcing poor Seymour to take to the street in search of victims, lest he disappoint his boss and his adoring girlfriend, Audrey (Jackie Joseph).