Long ago, a group of brave explorers set out to examine the ruins of an ancient city deep in the jungle. They had heard old legends of a great civilization that had vanished from the Earth thousands of years ago. No one knew why its people had disappeared — or what treasures they had left behind.

The jungle was thick and dark. Strange birds cried above them, and the air was heavy with the smell of wet leaves. After many days of walking, one of the explorers suddenly stopped. Through the trees, she could see the stone walls of something huge — something that should not have been there.