A spacecraft is discovered on the floor of the Pacific Ocean, presumed to be at least 300 years old and of alien origin. A crack team of scientists and experts is assembled and taken to the Habitat, a state-of-the-art underwater living environment, to investigate.

While James More is held captive by terrorists in Somalia, thousands of miles away on the Greenland Sea, his lover Danny Flinders prepares to dive herself in a submersible into the deep bottom of the ocean, tormented by the memories of their brief encounter in France and her inability to know his whereabouts.

When a daring mission leads a deep sea submarine team into a mysterious opening on the ocean floor, they uncover a lost underwater world and awaken its ancient race of otherworldly beings.

Deep sea: 1000m below the surface no light, immense pressure and icy temperatures. The deep sea encompasses more than 90% of the planets habitat. Yet we know less about these depths than about the moon. This film documents the technical, scientific, and ecological challenges of deep sea researchers. Scientists work worldwide together to collect data on the physical state of the upper ocean. With more than 3000 autonomous floats they monitor the oceans for influences on weather systems like El Nino or the monsoon. Does it affect global climate change? Does the deep sea offer solutions for the CO2 issue? Researchers in the Okinawa Trough are trying to find out. The sea floor harbors enormous amounts of resources: oil, natural gas, methane. Scientists work hard to try and locate these materials. Millions of deep sea dwellers are waiting for their discovery. The Census of Marine Life is trying to catalogue these bizarre ocean creatures before they disappear.

The Sealab project, launched in 1969 off the shore of northern California, was the brainchild of a country doctor turned naval pioneer who dreamed of pushing the limits of ocean exploration like NASA did space exploration. The massive, 300-ton tubular structure was a pressurized underwater habitat, complete with science labs and living quarters for divers who would live and work there on the ocean floor for days or even months at a time. During the height of the Space Race, this daring program also tested the limits of human endurance and revolutionized the way humans explore the ocean.