Sadiq's father is going on a business trip, but before he goes he tells Sadiq a story of the Desert Star, which fits in perfectly with Sadiq's third grade class field trip to the planetarium, and inspires Sadiq to build a simple telescope to study the stars when his father returns.

"Famous astronomer Dr. Arnot gives Nancy, Bess, and George a star-studded planetarium show and promises to elt them gaze at the night sky with his famous telescope, the Starship 5000, but the telescope goes missing. It's up to the Clue Crew to investigate the suspects and track down the telescope snatcher." --

When a rainstorm prevents Nancy and her best friend, Robert, from getting to the planetarium the night of a class field trip, she has a brilliant idea for making things better.