Elliot Major accepts an assignment from the Inex Pharmaceutical Corporation in Dubai to impersonate Robert Sinclair, an incapacitated rogue scientist in their employ. His must find out from Robert’s new friend, Helen Burford in Lausanne, if Robert had given her any information on an Inex Yellowstone program. When Helen meets Elliot, she is unaware he is posing as Robert. She confirms that he previously spoke to her about Yellowstone and that he was getting proof that people died during their experiments. Elliot falls in love with Helen and feels guilty about the deception, but before he can explain the ruse, he finds her brutally murdered in her apartment. As detectives place Elliot into a police car, Elliot notices the bald-headed man who brushed by him as he arrived in the foyer of Helen’s building. The man stares at Elliot and mouths, «You’re next.» When the police release Elliot, he realises he has unwittingly caused the death of his lover and that Inex has made him an accomplice in an illegal operation of deceit and murder. He escapes from the Inex security people and returns to England to avenge Helen and Robert’s murders. He follows the encrypted clues in Robert’s notebook that uncovers a much larger conspiracy, drastically changing who he really is and his whole perception of reality.