Matti and Max find a mysterious map while exploring the caves of Matala on Crete. The two friends can't believe their luck. Could there be a hidden treasure? The clues take the boys on an adventurous journey to the island's past with tales of pirates, flower children and mythology. But danger lies ahead as Matti and Max stumble upon a secret they were never meant to discover...

Matti and Max find a mysterious map while exploring the caves of Matala on Crete. Could there be a hidden tre ...