"Mr. Clark, may I have a few words with you?" "Do we know each other?" "Not yet," the man responded. "I'm Jack Goodman and I assure you that I mean you no harm. I do, however, want to ask for your help." There was something odd about the man; perhaps the eyes. Little did Alex Clark know that upon hearing those words, his life would change forever. Jack Goodman is a "Gardener" - a machine sent to Earth 50,000 years ago from a distant planet to tend to a new "crop" of humans. But his masters on Uor can't resist the temptation to tamper with social and political happenings on Earth. Now Alex must learn about quantum physics and anthropology. In addition, he must navigate a global political landscape to convince doubtful politicians of the dangers from climate change. Of course, he can't tell them that the real danger comes from a place called Uor. Alex learns that much of what he was taught about history and religion may be wrong. Also, he finds the love of his life, with whom he shares his predicament. Together, they can save humankind, but if they fail, the planet will be plunged into centuries of warfare and destruction. Personal danger is never far away either, as powerful forces try to stop them.