Many years ago, a dragon fell into the Songhua River. This incident caused a sensation at the time, but the government suppressed it for fear of causing trouble, so not many people know the details. The protagonist's friend is betrayed, his love is broken, and he is unhappy at work. He accidentally runs away and obtains the treasure of a fallen dragon that can avoid water. Later, he accidentally enters the tomb robbing profession, explores the strange tombs in the river, and the mysterious deep sea world of another sea clan. After experiencing countless adventures, she finally found the crystallization of love, who has always been with her.