Woodcutter Lin Housheng went into the mountains to chop firewood and accidentally met Ao Jingyuan, the Azure Dragon of the North Sea who had been trapped in Hanyue Pool for three years. Learning that the other was on the verge of death, he hurried through the rain, fetching a broken iron blade, a bellows, and a whetstone, breaking nine chains with mortal strength. After escaping, Ao Jingyuan did not forget the kindness, using a protective pearl to save Lin Housheng's frail daughter Xiao He, and secretly gifting silver to help him get through hard times. The man and the dragon forged a genuine bond through adversity, also allowing Ao Jingyuan, who had been hurt by family affection, to believe once again in the power of kindness and promises.