When called to the scene of a horrendous crime Will sees that the police are not being told the whole truth. His insights into the case attract the interest of Dr. Helen Magnus who introduces him to her sanctuary for 'abnormals,' creatures that have remained hidden from most of the world only appearing occasionally as characters in stories and myths.
When Dr. Magnus, Will and Ashley rescue three entombed women Will struggles to accept that the women are suffering from anything more than a group delusion, Dr. Magnus suspects that the women are much more than they appear.
After capturing a particularly elusive abnormal the plane carrying Dr. Magnus and Will crashes while transporting the creature. Dr. Magnus and Will soon discover why this abnormal has never been captured before.
Dr. Magnus, Ashley and Will retrieve two species of abnormal that have the ability to camouflage so well that they are near invisible. One appears to be a vicious predator, the other a cute, furry animal but nothing is as it appears.
When an old friend of Will's goes missing his wife contacts him for help. With the help of Helen and Ashley, Will finds that his friend has been taken and forced to fight underground. But as they continue to search, things start to become quite familiar to Helen.
Desperate to get her first exclusive story, a reporter and her cameraman sneak inside an evacuated building. Inside they find Dr. Magnus and her team, and a creature greater than any of them were prepared for.