From the back of the Starter Box:
Silence! Do not interrupt me again, if you value your life. House Atreides, our blood foes, have taken Arrakis, and we, with allies of our own in the shadows, prepare to strike back. You must help us retake the planet. Obey without question, send your House to die at our command, and we will consider elevating your pitiful House into the High Council. Fail, and you shall never dare to sleep again.