Cora, one of the last Sentinels, remains the last line of defense against an unknown enemy laying siege to her planet. Together with a handful of allies, Cora must find a way to protect the one thing this enemy had come to destroy - the humans.
1635: a war veteran, troubled by visions of the future, enters the Pantheon in Rome. He seeks answers. He needs redemption. A five year old girl, and her female-line descendants in the present day, hold the key to the future of humanity,