The closest planet to the Sun, Mercury is an airless, heat-scorched world where temperatures rise to four times higher than the boiling point of water. But this vision of hell is also a planet with unlimited solar power – worth a fortune to the space tycoon Saito Yamagata if he can find a way to harness it. He has hired the enigmatic Dante Alexios to establish a research station on the surface of the planet and find a way to turn that solar energy into portable power satellites. But Yamagata is secretly also preparing the way to a very different dream: he wants to travel to the stars themselves. And Alexios has his own obsession, a plot to lure an old enemy to this hellhole of a world and take his revenge for one of the worst disasters in human history.