The Mermaid’s secret

Joanne comes home from school, stars in her eyes, after a magical day spent with her year 6 class at Nausicaà, the biggest aquarium in Europe. It is also the beginning of the Christmas holidays which means spending time with her Belgian cousins, Victor and Loulou. The young girl from Wimereux has prepared a lovely surprise for them. Nicolas, science educator at Nausicaà, has invited them to the aquarium for a private visit of the behind the scenes. But nothing happens as planned. Joanne overhears a highly suspicious onversation between two men. Who are they? What are they up to? Their curiosity aroused, it takes no more than this to draw the trio into a new investigation.