Having discovered the first part of the key, from a famous scientist in the distant past, that will send the evil kingdom of Gondwana back down to the bottom of the sea, our six teenagers now have to find the other five parts. Who has them and where are they, and in which time and space? The clues are in their medallions which they must decipher. The evil empress Cremelle is in pursuit to stop them. She kidnaps them and hides them in dangerous spaces. Why is she afraid of Axxiss, the Indian American boy leading them?


What is the mysterious black dog which protects and guides them? Who created the exact clones of the teenagers which are determined to kill them? Who has started the revolution against the empress in the undersea kingdom? The six, growing closer to each other, have to survive the many dangers to find the secrets of this strange key.