A poor boy, Ahai, risked his life to save a white dragon locked at the bottom of the sea. The dragon gave him a reverse scale and promised him three wishes. Relying on this grace, he turned his entire village around, overthrew the bully, and wiped out the mastermind, the black flood dragon. However, before the grace was fully repaid, the white dragon reincarnated as a human, wandered around and returned to his side, repaying a life-saving grace with a lifetime. The whole play tells only two sentences: a drop of water's grace is repaid with a gushing spring; as long as the sea does not dry up, affection and righteousness never break.