Danish brilliant pre-teen student Nis uses his summer holiday to learn Latin so he can properly study the Knights Templar inheritance on Bjornholm island from sources. His friends Mathias, a dumb jock, and Kathrine, who only comes to spend time wear her dad, who really wanted a boy, prefer childish fun, but get dragged in his quest for a treasure. Mats's strength, Kathrine's connections and even Nis's bratty kid sister's blunt remarks contribute to find out about two brotherhoods, heirs of 12th century factions in the Templar order and deal with danger.
Elenco: Julie Grundtvig Wester , Christian Heldbo Wienberg , Nicklas Svale Andersen , Frederikke Thomassen , Peter Gantzler , Ulf Pilgaard , Kurt Ravn , Birgitte Simonsen , Bent Conradi , Søren Steen , Jarl Forsman , Ingerid Nielsen , Claus Nielsen , John Rost , Jan Kofod , Karl-Johan Kure , Nis Bank-Mikkelsen .