King of the Jungle

In Africa, John and Edith Knolls take their little boy into lion country for a photographic expedition, but both parents are killed by lions. The precocious boy keeps his father's hunting knife and is reared by lions as if he were their own cub. Years later, he is able to communicate with the lions by roaring. When the young man helps the lions raid a cattle ranch, he is caught and sold to an American circus along with his lion family.

Neil Forbes, the manager of the circus, names the young man Kaspa, and has him shipped to San Francisco. Upon docking, Kaspa, wearing only a leopard skin, dives into the bay. When he finally swims ashore, he is chased through a park and into a private home, where he startles Ann Rogers and her roommate, Sue. The police arrive and Ann accompanies Kaspa back to the circus, where she is invited to travel with the circus to educate him. As they become better acquainted, Kaspa and Ann fall in love.

After Gus, a member of the circus, taunts a lion, he loses his arm and later plots to kill the animal. Kaspa quits the circus because he wants to return the animals to Africa, but in the meantime, Gus gives poisoned meat to the lion who mauled him. Forbes catches him, and in the ensuing struggle, a lamp falls over and the tent catches fire. After Gus is arrested, the whole circus goes up in flames, causing a panic, but Kaspa rushes in and saves the lions. He then returns to Africa with Ann, and together they set the lions free.