One after another, defenceless African villages fall prey to dangerous, armed-to-the-teeth slavers. To put an end to their reign of terror, Tarzan, mighty defender of the jungle, and Sir Basil Bertram organise a line of defence, only to find themselves at the mercy of the invaders. However, no cage can keep imprisoned the fearless king of the jungle, and before long, Tarzan embarks on a peril-laden mission to free the captured slaves. Now, untamed Tarzan wants to see that justice is served. Who can stop Tarzan, protector of the innocent?