Khalid returns from a trip with a wonderful present for Mansour, a brand-new Panther-Drone. Obaid and Salem are very excited, but Mansour thinks that Nano's latest upgrade will mean he can easily compete with the Panther Drone; Obaid and Salem doubt this, so Nano and the Panther Drone agree to a friendly race. Friendly? Not at all. Once they are into the competition the Panther-Drone reveals its self to be a spiteful machine, it cheats and wins the race. Nano tries to tell Mansour and the boys the truth about the Panther-Drone but Salem and Obaid think this is a case of sour-grapes on Nano's part. Nano sadly recharges his battery while Mansour and the boys take the Panther-Drone on a tour of the city. The boys very quickly realise that there really is something very wrong with the Drone as it causes havoc where ever it goes. There is only one who can stop it. Time to call Nano.