Lin Ye, Su Wan, and Lao Zhou encounter a storm and drift onto a desert island. After waking up, the three check their injuries, confirm no short-term rescue, and shift their goal to finding fresh water and building a shelter. The threat of beasts in the jungle forces them to move inland; along the way, Su Wan gets stuck in the mud and injured, Lin Ye discovers airplane wreckage on the beach, and Lao Zhou's damp lighter becomes the key to a fire source.