Watch full movie online. Set 10,000 years in the future, looking into the past (our present), the mermaid archeologist of Sunken Cities dives into depths of the Gulf of Naples. Baia - an ancient Roman town situated on the northwest shore of the Gulf of Naples, currently underwater. Under the waves, the hedonistic resort of Baia unfolds as the mermaid swims: the sunken hallways, strange scaffoldings, sculptural figures of destroyed empires, mosaics of the sea floor - Roman ruins taken by the sea owing to local volcanic activity.