In an age long ago, the last village of clever, peace-loving Hobbits is attacked and enslaved by the Java Men, komodo-worshiping, dragon-riding cannibals. Now the young Hobbit Goben, along with his father and sister, must seek help from the "giants" (human hunters) to find the Javas' lair and rescue the last surviving Hobbits, Goben's mother among them. In their quest to destroy the Javas, the heroic partnership of humans and Hobbits will transform both species forever.

Based on the novel by Edgar Rice Burroughs, a US soldier finds himself inexplicably transported to Mars in the midst of a war between two alien races.