After a failed mission in Afghanistan, Captain Joe Carter is kicked out of the Special Boat Service and finds himself looking for a new purpose in life. He is recruited by The Foundation, a team of ex-spooks and special forces who are headed by the mysterious priest, Father Assaid. They are engaged in a war with the Nephilim, the children of the fallen angels. This is a war that has been fought over several millennia. There can only be one winner.
Everything Joe Carter thought he knew about the world he lived in is challenged as he discovers the true history of man and the struggle between the powers of good and evil. As he and his new colleagues fight the Nephilim and their followers across the globe from the suburbs of Madrid to beneath the streets of London, they are battling for their own survival and the survival of humanity.