Continuous heavy rain triggers floods, and the catastrophe arrives. Wang Lan returns to the moment of choosing her system, abandoning the highly sought-after magnification system and choosing the niche thousand-fold shrinking ability. She hoards supplies in advance, builds a hidden refuge stronghold, and accidentally meets mechanical engineer Lu Chenzhou. Together, they work with one heart to fight against the natural disaster. Her younger sister, who possesses the magnification system, chooses a completely different path. Under the endless floods, Wang Lan and her partner work hard together to find a way out to end the ten-year heavy rain calamity.