Tarzan aids a scientist and his daughter in their attempt to build a rocket that will reach the moon.

Dreaming of building a powerful rocket to lead an exploratory expedition to the moon, Professor Anil has holed himself up in his well-equipped laboratory in the heart of the jungle, dedicating his life to science. Before long, the king and his queen pay the scientist and his beautiful daughter, Mala, a visit, unbeknownst to them that Niranjan, the ruler's plotting advisor, has set his sights on stopping the experiment and capturing them. But the impenetrable jungle has eyes, and Tarzan, the mighty king of the jungle, intervenes, bent on thwarting Niranjan's evil plan. Now, an exciting adventure to the depths of the cold space awaits them. Will the professor's state-of-the-art spaceship fall into the wrong hands? Can the earthlings survive the attack of the unstoppable robotic defender?—Nick Riganas