10-year-old Nina has always filled her imagination with her dad’s hedgehog diverting stories. But when he loses his job, Nina starts to worry about the future of her family. After hearing rumors of a treasure hidden by the old factory’s boss, Nina and her best friend Mehdi decide to organise a risky hold-up, to share the swag between her father and his fellow co-workers. A crazy adventure begins, in which they will have to escape from the old neighbour and her furry cat, outwit the caretaker’s traps and trick his big dog... As well as that, a little hedgehog accompanies them in their investigation.