马力和收养家庭一同到南美洲寻找他的父母，由于亚马逊河流域非常大，他们打算从上游的秘鲁找起。
因为一只鹦鹉的提示，他们上到马丘比丘，在那里找到了一个赤陶圆盘，加上采药人给的线索，绑架马力父母的人呼之欲出。他们是谁？既然地球已经被解救了，为什么还不放走人质？难道与传说中的黄金国有关？
这是
B
杜一系列悬疑探险小说中的第二部，内容曲折离奇、险象环生，读完像经历了一场奇妙之旅，适合各个年龄层的读者阅读。
Ma Li and his adoptive family went to South America to find his real parents. Since the Amazon river is so long, they planned to start from Peru
,
the source of the Amazon River.
Thanks to a parrot, they climbed to Machu Picchu, where they came across a terracotta plate. Later, aided by a local herb gatherer, they discovered the identity of Ma Li's parents' kidnappers. Even though the Earth had now been rescued, why would they still not let the hostages free? Was it to do with Eldorado?
This is the second in a series of adventure novels by B Du. Suitable for all ages.