In 2330 AD, the water sources on the earth's surface were completely destroyed by industrial pollution, and the survivors relied on scarce purified water to survive. Environmental engineer {Lu Chen} can map the distribution of underground water sources. In order to find the legendary "underground water purification station", he led mechanic Zhao Ye and scout Lin Xia deep underground.
On the way, they were attacked and injured, and were rescued by Su Rui, a doctor who studies the dangers of water pollution. Su Rui's research data complemented Lu Chen's water source map, and the four formed a team and continued moving forward.
The underground world is full of dangers, and the plunderers headed by {Thunderstorm} are also searching for water purification stations and have launched attacks on them many times. Lu Chen relied on water source maps to avoid contaminated areas and set traps. Su Rui treated the injured and analyzed pollution risks. The team worked together to overcome numerous obstacles and finally found the water purification station, fought off the predators, and established a water purification base to protect survivors.
