Zak and Tasa's vacation to the palace of Jabba the Hutt turns creepy when they visit the B'omarr monks who live in tunnels beneath the palace.

Thirteen-year-old Tash, her younger brother Zak, and their Uncle Hoole visit the planet D'vouran, where they encounter the sluglike crime lord Smada the Hutt and reports of people vanishing into thin air.

Hologram Fun World is a theme park visited by families from all across the galaxy. One of the park's attractions is called the Nightmare Machine. It scans your brain, then shows you your worst fears in holographic form. It's not real, so it's fun--right? Zak and Tash soon find out that nightmares can come true.