When an industrial spy is captured in a multinational’s Berlin skyrise, the company's lead counsel, Annie Bennett, is sent to interrogate him while they await the police. She soon learns that the man isn’t a spy at all, but a mysterious scientist who accuses Annie’s company of kidnapping his wife and holding her in a laboratory. As a series of murders erupt throughout the building, Annie discovers that her company has been attempting to accelerate human evolution to adapt man to extraterrestrial environments. Only, instead of testing on humans, they’ve been using tens of thousands of scientifically-harvested ghosts. As the intruder prepares to release all of the vengeful ghosts at once to slaughter the building's employees, Annie must decide who the real enemy is.