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.

Slick lawyer Thomas Farrell has made a career of defending mobsters in trials. It's not until he meets a lovely showgirl at a mob party that he realizes that there's more to life than winning trials. Farrell tries to quit the racket, but mob boss Rico Angelo threatens to hurt the showgirl if Farrell leaves him.

A garage owner marries a much younger woman. Trouble begins when he becomes friends with a man who has his eyes on his former-showgirl wife.