In a tropical beach resort area, the improbably-named Ben Abdullah Schwartzburg shuffles a set of large, colorful leaves like a deck of cards. This catches the attention of Prof. Leviticus Wirtsus (played by director Eduard Cemano), who eats a bit of the Fongaluli leaf and goes on a Lewis Carroll-like fantasy trip of sex and madness.
The Professor feeds a piece of leaf to his pet lobster, Shirley, which transforms it into a naked woman. He falls in love with her, although she frequently returns to her old lobster self. This dilemma sends the Professor on a quest for more Fongaluli leaves. In his travels, he visits an island inhabited by a giant nude woman, who says things like, "Hello sweet pants, sock it to me," Mae West-style. In exchange for some Fongaluli, he climbs inside of her and jumps around on her clitoris (off-screen).
Shirley reappears as a human woman (always naked), and masturbates against a palm tree. A giant lizard menaces from above (a cheap special effect with a visible human hand holding a real lizard in extreme close-up). Throughout, I kept thinking I was watching a film made by mentally defective teenagers.
Four hairy young men and woman cavort amid the palms, acting strange and yelling "Sex time!" before getting down and dirty. These and most of the other sex scenes are of the "scream louder" variety and too dark to see anything clearly, although FONGALULI is clearly a porno movie.
Eventually, the Professor finds a witch who claims that she, not the Fongaluli leaf, turned Shirley into a human. She wants The Professor to "do the Fongaluli trot" with her. The Professor, though, wants to be with Shirley, so the witch turns both of them into lobsters. There's some lobster dialog and even a lobster sex scene.
The music mixes accordion polkas, Strauss, and uninspired orchestral selections (the only thing missing is bootlegged Pink Floyd tunes).