弗兰克一直在几内亚的艾萨阿拉附近探险，但是这些探险都无法满足弗兰克的雄心壮志，于是他准备去一个巨大山洞，这里无人来过被称为洞穴之母，因为他是目前世界上最大、最深、最危险、最雄伟、结构最为复杂的洞穴，要成为著名的探险家，这个洞穴可以创造世界纪录。弗兰克找来投资和几个精兵一起下洞穴探险。刚开始探险十分顺利，因为他们都是世界最专业的团队，设备也都是最顶级的，但是随着不断深入后，水流和地形越来越复杂。

这时，几内亚来到了雨季，强烈的暴风雨使洞穴地下行程了洪水，阻止探险小组继续深入。在失去几个成员后，弗兰克决定带着短缺的食物和饮用水，不得不改变之前的计划通过潜水逃出这个仿佛迷宫一般的洞穴，找到前往海洋的路。

Frank has been exploring near Isaala in Guinea, but none of these expeditions can satisfy Frank's ambition, so he is going to a huge cave, here No one has ever been called the mother of caves, because it is the largest, deepest, most dangerous, most majestic, and most complex cave in the world. To become a famous explorer, this cave can set a world record. Frank found an investment to go down the cave with a few elite soldiers. The expedition was very smooth at the beginning, because they are the most professional team in the world, and the equipment is also top-notch, but as it goes deeper, the water flow and terrain become more and more complicated

At this time, Guinea came to the rainy season, and the strong storm flooded the cave underground, preventing the expedition team from going further. After losing several members, Frank decided that with a shortage of food and drinking water, he had to change his previous plan to escape from this maze-like cave by diving and find his way to the ocean.