In ancient China, a group of European mercenaries encounters a secret army that maintains and defends the Great Wall of China against a horde of monstrous creatures.
Four waves of increasingly deadly alien attacks have left most of Earth in ruin. Cassie is on the run, desperately trying to save her younger brother.
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.
A young couple visit a remote cabin in the woods but on the way meet a suspicious stranger who holds a murderous secret.