Take an amazing journey a mile underground into the deepest mine in the United Kingdom. This is Yorkshire, England 2013. Follow the men of the long hole crew, join them on their working shift in the hot dusty atmosphere of a potash mine. A collapse. A massive collapse, they escape, but barely. What grabbed at Jonesy's foot in the dust cloud? Rescue eventually comes. Specialists go underground and discover a wonderous cavern has been opened up. They make a gruesome discovery. Is it the work of a religious sect or is it something more sinister? A police scenes of crimes team is sent to investigate, all but one is slaughtered, a bloodbath, but by what? Ancient carvings on the walls take the adventure back to 1500 B.C. Central America. Experts in Mexico City identify an ancient people, the Olmec, as the possible writers, but how? Who or what carved these glyphs in a cavern in Yorkshire? The threat now identified, the British police are unable to help. A fearless team of British Special Forces, along with their "Bulls" are sent in to eliminate the malevolent threat. How will their assault on this threat turn out?