Jonathan Doors. A man at the head of the world's largest corporation, Doors International. A man of wealth and power, with the resources to change the world. A man whose life is about to change forever. In the early days of the twenty-first century, The Earth stands still to hear the message: "We are the Companions ..." The Taelons have arrived from beyond the stars on mission of mercy, to help humanity claim its destiny. Contacted by these Companions, Jonathan Doors helps introduce the aliens and their fantastic technology to the world. But there is a dark shadow behind the Taelons' bright promises, and when it is revealed to Jonathan Doors, he will become their greatest enemy.