Centuries ago, the human race had arrived at the Swelgarian system in order to escape extinction and were welcomed by a mysterious race called the Derohi, after being attacked by a creature called a Wyrse. In the present day, the Derohi had been annihilated by humans and Wyrses, and a relentless battle between Wyrses and humans is being waged with the humans holding the upper hand, thanks to the organisation called Hunters. Steve Carrel, a hunter, and his siblings are plagued by strange dreams about the locked room which is believed to contain the last remnants of the now extinct race of the Derohi. Kevin Bones, his grandfather is murdered, his brother Paul is attacked, and Richard, his father is in a coma after visiting the planet of Kadel where the locked room is. When truths about their connection to the locked room come to light, the Carrels and their friends find themselves in a race against time to save themselves as well as the entire planetary system from the power within the locked room.