They thought the nightmare was over. But a new terror has been unleashed... Reporter Denny Purcell knows the truth. Aliens are real. The Interlopers, sinister invaders from another dimension, live among us. She's determined to expose these beings and their horrific plans. But to the rest of the world, Denny and her team are just another group of crackpots and raving lunatics. When reclusive media mogul Sir Charles Lanier offers her a job, Denny and her partner Frankie leap at the chance to prove their theories. But they soon discover they are trapped in a deadly conspiracy, with origins far beyond this world. The interlopers have a new queen, a powerful hybrid named Cassandra. And Cassandra is determined to silence the two reporters once and for all. On Lanier's private island off the coast of Wales, Denny and her partner are subjected to a horrifying ordeal. Denny must battle for control over her mind and body after she is infected by an alien symbiont. She and Frankie soon find themselves on the run, hunted across the island by Cassandra's underlings. As they struggle to escape the queen and reunite with the rest of their team, Denny begins to fear the worst. Removing the fused symbiont could kill her. But leaving it attached could lead to a fate worse than death. A slow, painful transformation into an alien creature...