"If it's going to happen," thought Bill Ricker, "it's got to be quick." Lounging deep in his red-leather chair, he peered out of the port as the sleek space ship streamed through the darkness. He could see nothing outside but a big, humorous-eyed young man who was his own reflection and the pale green globe that was Neptune. The great planet hung like a ghostly emerald in the void, sinister in its loneliness. But bleak, desolate, a snowball of frozen gases, it was hardly the place for an ambush.