Synopsis
Sonic vibrations are causing destruction all over the world and the Avengers trace their source to the Southwest. Meanwhile, a new mountain is rising from the ground near the missile base and General Ross orders Bruce Banner to investigate it. The Avengers arrive and break through the mountain and discover the Lava Men waiting for them below. The Lava Men tell Thor about their discovery of the Living Stone, a volatile substance that threatens their underground lair. Their solution was to push the Living Stone above ground so that when it explodes, it would destroy the surface world and spare them. The Avengers battle the Lava Men. Nearby, Banner turns into the Hulk and finds his way underground. The Avengers, fearing that Jade Jaws could set off the Living Stone, turn to subdue him and the Wasp tricks the Hulk into slamming his fist into the Stone, causing it to implode rather than explode, ending the threat. Thor persuades the Lava Men to live in peace with the surface-dwellers. Betty Ross finds the injured Bruce Banner in the desert and helps him back to the base.
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