本輯節目會深入東南亞森林，調查濫伐森林引發毀滅性禍害的成因。非法狩獵活動與日俱增，除了令野生動植物持續受到威脅，亦將一班生態捍衛者陷於高風險的戰場。他們為何要冒性命危險？為了守護大自然，他們又要付上什麼代價？ 菲律賓的馬蘇尼自然保護區，是首都馬尼拉防洪的重要分水嶺，護林員古簡．馬斯和一班同事工作時還要面對入侵者的槍擊和襲擊；在印尼，我們會跟隨亨德拉．薩普特拉及其護林員團隊在森林裡生活幾星期，實地保護勒塞爾生態系統，那裡是地球上最後一個有野生老虎，大象，猩猩和犀牛的地方。最後，我們會拜訪全泰國最大的崗卡章國家公園，護林巡邏團隊隊長妮塔娜帕．雅姆妮會帶我們進行武裝巡邏；其對環境犯罪零容忍的政策，卻令她成為犯罪集團的目標。

We go deep into Southeast Asia’s jungles to see what’s causing the devastating extent of deforestation. Wildlife is also under constant threat from increased poaching, which has created high-risk battlegrounds for environmental defenders. Why do they risk their lives, and at what price?

In the Philippines, ranger Kuhkan Maas and his colleagues face shootings and assault from encroachers as they protect Masungi Georeserve, a watershed vital in preventing floods in the capital Manila.

In Indonesia, we follow Hendra Saputra and his team of rangers who live for weeks-on-end in the jungle to protect the Leuser Ecosystem, the last place on earth with tigers, elephants, orangutans, and rhinos in the wild.

In Thailand, Netnapa Ngamnet, the head of a ranger patrol team in Thailand’s biggest national park, Kaeng Krachan takes us on armed patrols. Her zero tolerance policy towards environmental crimes makes her a target to criminal syndicates.