But it is troubling enough to the Imperial leader to warrant investigation by his most powerful agents: ruthless enforcer Lord Vader and brilliant strategist Grand Admiral Thrawn. Fierce rivals for the Emperor’s favor and outspoken adversaries on Imperial affairs—including the Death Star project—the formidable pair seem unlikely partners for such a crucial mission. But the Emperor knows it’s not the first time Vader and Thrawn have joined forces. And there’s more behind his royal command than either man suspects.