Elle is the daughter of the Harts, the greatest crime family of 2837. Or, at least, they would be if the Scola family didn't exist. With the recent invention of time traveling, the two families regularly race across the centuries committing assassinations for pay. Elle meets her match with Ace Scola, the prized son and future heir to the Scola crime empire. But what happens when the Harts devise a master plan to rid not only themselves, but the entire world, of the Scolas?