A very important lady, Mother Raquella, has a scary dream before she dies, showing bad things happening to her friends.
A giant sandworm appears in her dream, warning of danger coming from a faraway desert planet called Arrakis.
Some people get badly burned in the dream, and it's linked to a mean man with strange powers.
A princess's plan to become queen might actually make things worse, causing a big problem in the future.
