风光旖旎的度假岛，新晋网红打卡胜地“紫色湖泊”引来众多游客，“紫色湖泊”接连吞噬游客数人。东南亚某国首富独生女在此无故失踪，战地记者白羽展开调查，经生物学家与“鳄鱼猎人”证实，首富之女已死于鳄鱼之口。首富誓言不惜一切代价猎杀鳄鱼，为女复仇。谁曾想，猎鳄反而被“变异巨鳄”猎杀，命悬一线，谁能死里逃生？

The Purple Lagoon, the newest internet sensation on the resort island, has attracted many tourists, but the Purple Lagoon has swallowed several of them. When the only daughter of the richest man in a Southeast Asian country goes missing for no apparent reason, war correspondent Bai Yu investigates and biologists and "crocodile hunters" confirm that the richest man's daughter has died in the mouth of a crocodile. The richest man vows to hunt the crocodile at all costs to avenge his daughter's death.