What Nicolas (9) loves most is playing with his gang of middle school pals, The Invincibles. Adorable, yet mischievous, they have all sorts of adventures together and life could not be funnier. So when his dad gets promoted and announces that the family is relocating to the South of France, his world falls apart. Little Nicholas cannot live without his friends. But the pack has a plan to prevent this terrible relocation: a treasure hunt.