Senior landscape designer Su Ye and introverted meteorological intern Chen Mo, during a routine inspection trip to a tropical rainforest meteorological station, were forced to land in an unmarked primitive valley due to a rare advection fog that caused plane communication failure. This is not a desperate situation, but a 'Green Ark' with a unique ecological cycle. Unlike traditional desert island survival, the two did not face the threat of hunger and beasts, but needed to find a way out by interpreting clues left by nature—such as the growth direction of plants, the migration paths of insects, and the texture of rocks.