Halong Bay in northern Vietnam: 2.000 islands, deep ravines, rough rocks and many caves. Numerous legends revolve around this bizarre and twisted landscape, the most prominent of which is about Ha-Long, the "Descending Dragon". According to the tradition, he was sent by the gods to defend the Vietnamese from their enemies. The film portrays one of the remaining 300 families living in floating houses and travelling troughout the bay to fish. There are more than 1.000 kinds of fish and 160 coral types. However, this diversity is endangered. Important shipping lines lead right through this island world, industrial centres line the shores of Halong Bay. The rapidly increasing tourism also brings along dangers.