Mo, along with a team of other colonists, has landed on a distant planet where intelligent life has disappeared more than fifteen hundred years ago.

He has finally set out on a long-awaited expedition to the ruins of some huge ancient pyramids, located in the heart of an impenetrable jungle. They have an almost uncanny resemblance to the pyramids of Mo's childhood, which have fascinated archaeologists and scientists for centuries, tantalising them with their riddles and secrets buried deep in the hot sands of the desert.

Could it really be a coincidence that these people, so similar to us, who once lived on this deserted world, built pyramids that are an almost exact copy of ours? Or are our pyramids – just a replica of these majestic local monuments? What secrets do these ancient stone sentinels contain and is it in humanity's interests to find them out?