Professor Simon Ruttledge (Jonathan Welsh) is supervising an archeological dig beneath a New York construction site when his ultra-sound equipment triggers the resurrection of a long-dormant Atavus named Nahema (Cherilee Taylor). After killing one of the site workers, Nahema flees into the streets of the Big Apple.

Ruttledge contacts Renee Palmer (Jayne Heitmeyer), who immediately launches a search for Nahema. While Ruttledge and J. Street (Melinda Deines) work from the safety of Augur's lair, Renee goes in pursuit. With a laser knife in hand, she chases Nahema into the public portal, which transports both of them back through time to an ancient monastery. There, Nahema promptly kills two monks with her Atavus cleave and is about to kill a third, Father Franciscus (Michael Anthony Rawlins), but Renee again fends her off with the laser knife.

At that moment, the monastery's inquisitor (Richard Partington) appears with several other monks and mistake Renee for a succubus, an alluring female demon that they have been pursuing for years. Assuming she killed the two monks, the inquisitor orders that Renee be burned at the stake. Strapped to a rack while the monks go off to prepare her pyre, Renee is helpless, until Franciscus reappears and unties her. Together, they go in pursuit of Nahema, the so-called succubus who has terrorized the monks. Renne learns that Nahema had killed Franciscus' wife and family, prompting him to join the monastery in an attempt to thwart the demon. They catch a glimpse of Nahema just as she vanishes through a portal, which they use to time-travel back to the lair.

Street determines that Nahema has somehow portalled to the Taelon Mothership. There, Nahema meets with Howlyn (Alan Van Sprang), her former mate from three millions years ago who is now the king of the Atavus. To prove herself worthy of being his queen once again, Nahema vows to rid Earth of humanity.

At the lair, Renee arms Franciscus with a laser knife and a fusion grenade, before the two are portalled to Hong Kong, where Street believes Nahema to be. They no sooner arrive than they receive a global communication from the lair, only it's Nahema who has tricked them all. Renee and Franciscus immediately return, finding that Nahema has abducted Ruttledge and again portalled away. Entering the portal, Renee and Franciscus emerge in a giant hall amidst the ancient home world of the Atavus.

Nahema challenges them to a battle while a chained Ruttledge looks on. The Atavus knocks Renee to the floor and then stabs Franciscus with her cleave. Before he dies, he is able to give Renee his fusion grenade. Renee quickly frees Ruttledge and together they portal into inter-dimensional space, where Renee gently pushes him ahead while she lingers, waiting in the rippling energy for Nahema. The Atavus appears and Renee leaps past her, back into the inter-dimensional vortex from which she came. Flying out of the portal into the hall, she grabs the device and directs it toward a massive stone column. The portal activates, imbedding Nahema in the stone and killing her. Renee then places Franciscus's grenade on the portal and whisks back to the safety of her own time before the explosive blasts the portal to pieces.

The next day, Renee and Ruttledge return to the archeological dig, where the professor unearths a three-million-year-old fossil of a female Atavus - Nahema. The threat of the newest, or perhaps oldest, Atavus is now gone.

This episode synopsis was originally produced by The Official E:FC Website and remains the property of Tribune Entertainment.