Leena, who suffers from selective mutism, and her family move to Riyadh because of her father's job. Her new home is in a modern apartment building where she meets and makes friends with Rima, a neighbour who is blind, and Jojo, who has a secret.

Together the girls encounter a clever cat, come across an ancient key, and find a mysterious old workshop full of books, inventions, and trinkets hidden under their building. Join them on their exploration of their amazing discovery and its secrets!

Who tampered with Leena and Rima's lemonade? Where did the clever cat come from? And whose kite will win at the Festival?