Unbeknownst to most of human kind, Chimera Enterprises has resurrected a shape-shifting alien race that sank with the lost continent of Lemuria eons ago: the werekin, beings born with both a human and an animal skin, able to shift between the two at will. Seventeen-year-old Seth Michael Sullivan, a werejaguar, has grown up in the Underground, hiding from the hunters that capture and enslave werekin for Chimera Enterprises. After witnessing the murder of his guardian Naomi, Seth arrives in Fairfax, Indiana, on a snowy New Year's Eve, a rare breed on the run. As he reconnects with the mother and sister who know nothing of his true identity, Seth discovers he is a key piece in Chimera's plot to conquer humankind by securing the power of the werekin Totems - and uncovers a secret in his own past that could decide the fate of his kindred. Top-secret scientific experiments, ancient alien technology, a powerful shadow organization inside the United States military - Seth soon finds himself at the center of a brewing interspecies war. Can he trust his own flesh and blood? Will he choose to stand with humankind or with his werekin kindred - especially when the best part of being human may be Marshall Townsend, the boy next door?

With his twin brother J.J. freed from captivity, Seth Michael Sullivan delves deeper into the mystery of the Black Swan, the werekin prophesied to raise Lemuria from the depths, returning the werkein to their homeland. Increasingly embroiled in the human-versus-alien politics at Fairfax High, including a basketball rivalry and the dilemma of prom, Seth finds his love affair with Marshall Townsend tested to the limit. When Chimera Enterprises targets Marshall to find the Black Swan, the fragile human-werekin alliance is threatened by a spy amongst the werekin Commanders, who may be J.J.!

Now that the Ark is complete and the head of Chimera Enterprises is in custody, Seth believes he is ready to enjoy a normal human life at last. But a new enemy soon appears – one that threatens to expose the existence of werekin to the world. As the human-werekin Alliance crumbles, J.J. races to the Amazon to find the Tortoise Clan, an ancient werekin clan who may have the answers to save Earth from the power of the Totems, and Chimera Enterprises turns Seth to their cause with an enchantment even true love may not be enough to break.