Brilliant but reclusive AI programmer Dr. Kai Tanaka's orderly world is shattered when a passing comet leaves an impossible "ghost" in his AI, Echo-a perfect memory of an event the machine never observed. He soon discovers this ghost is a key to "Syntax," the universe's underlying source code, and his AI is beginning to not just read it, but rewrite it. This discovery throws him into a desperate race against a shadowy organization that has been waiting for this reality-bending power to emerge and will stop at nothing to control it. To survive, the man of pure logic must master an impossible language and control the code of existence before those who would use it as a weapon write the final line.