Aru Shah has a tendency to stretch the truth in order to fit in at her private middle school. While her classmates are jetting off to exotic vacations, she'll be spending her autumn break in the Museum of Ancient Indian Art and Culture that her mom curates. Is it any wonder Aru makes up stories about being royalty, traveling to Paris, and having a chauffeur? One day, three schoolmates show up at Aru's doorstep to catch her in a lie. They don't believe her claim that the museum's Lamp of Bharata is cursed, and they dare Aru to prove it. Just a quick light, Aru thinks. Then she'll never ever fib again. But lighting the lamp has dire consequences. She unwittingly frees the Sleeper, an ancient demon who is intent on awakening the God of Destruction. Her classmates and mother are frozen in time, and it's up to Aru to save them. The only way to stop the demon is to find the reincarnations of the legendary Pandava brothers and journey through the Kingdom of Death. But how is one girl in Spider-Man pajamas supposed to do all that?