Out in the Arctic Ocean, the research vessel Alesia manages to capture a mysterious Magnapinna squid, an animal never before captured by mankind.
The researchers, led by Maria, decide to take the specimen back to port in Bergen, Norway. However, what they bring home isn’t just a scientific wonder but also a thing more horrific than Pandora’s Box. Soon, madness creeps into the crew of the Alesia and friends become monsters.
