When an unseen enemy threatens mankind by taking over their bodies and erasing their memories, Melanie Stryder risks everything to protect the people she cares about.When an unseen enemy threatens mankind by taking over their bodies and erasing their memories, Melanie Stryder risks everything to protect the people she cares about.When an unseen enemy threatens mankind by taking over their bodies and erasing their memories, Melanie Stryder risks everything to protect the people she cares about.