A look at human origins in the very place of our origins, Africa's Rift Valley

泥土，看似不起眼，但每一把泥土当中却含有超过十亿的有机物质，而这些物质恰好就是维系交互作用以及地球生态平衡的重要角色，本片以幽默充实的方式，带领观众好好看看脚下土地的过去与未来。现在，一群拥有各种不同身分的人，从生物学家到美国克斯岛监狱当中的囚犯，他们集合在一起，要告诉所有人该如何解决人类所造成的土地危机，并保护这些对生态永续维系非常重要的泥土。
幕后制作
导演比尔·本内森和吉尼·络斯沃因为 William Bryant Logan的著作《The Ecstatic Skin of the Earth, Dirt!》而起了拍摄本片的念头，由非营利组织Common Ground Media公司制作，并获圣丹斯电影节最佳纪录片的提名殊荣。

The search for The Lost City of the Monkey God follows explorer Steve Elkins and a team of archaeologists, anthropologists, scientists and filmmakers in this true-life adventure as they overcome torrential rains, dense jungles, poisonous reptiles and deadly disease carrying flies to search one of the last unexplored places on Earth for a lost Maya city. Using cutting edge laser technology, they can "see" the city hidden in the impenetrable jungle and with the support of the president of Honduras and his army they are able to save the found city from certain destruction and looting and properly excavate and preserve their discovery and begin to solve the mysteries of the lost city.