1119年，“圣殿骑士团”成立，他们是经验丰富的职业军队，积聚了相当可观的财富。 　　1307年10月5日，法国国王想通过打击圣殿骑士团，没收其财富，以补充日趋窘困的财政开支。但是，圣殿骑士团却巧妙地把大量财富隐藏了起来。 　　在遥远的今天，几个丹麦的小孩在一次偶然的情况下知道了这份宝藏，但是打开宝藏需要特定的符号,于是他们决定一起去寻找这份宝藏，但是路途异常艰辛，他们能否找到这份宝藏？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.