Beautiful alien Amazonian women plan to conquer the world using an army of vegetable monsters. Dim-witted privates Philbrick and Penn bumble into a cave in search of atomic activity but collide instead with fierce carrot-topped tree mutants and their leaders, the 7-foot space sirens Prof. Tanga and Dr. Puna. This lavishly low-budget sci-fi romp has the bodacious aliens planning to overrun Earth with their vege-men army, but first they want the G.I.s to explain the meaning of love.
Before the U.S. Civil War rebel leader Luke Darcy sees himself as leader of a new independent Republic of Kansas but the military governor sends an ex-raider to capture Darcy.
Out of hit ideas and seemingly in the twilight of his career, Broadway producer Russ Ward decides to give up the game. But when Russ lays off his nubile secretary, Ellie Brown, she shocks him with a declaration of love. Inspired, Ward commands playwright MacDonald to rewrite his latest show as a May-December romance starring Brown herself. Ward struggles to make a comeback as his ex-wife, Kathryn, plots to end his new relationship.