After receiving three new patients at the mental institution he runs, Dr. Bradburn is
immediately visited by an agent of the Tyranny who insists one of the men is a radical. Only
by asking each patient a series of questions will the supposed threat be identified. But the
questions Dr. Bradburn is told to ask—all about time travel!—will make him rethink
everything he knows about the world around him.
— based on publicity material
1 English variant