Atlantica is an underwater nation isolated from the rest of the world. It has a functioning government and highly advanced technologies compared to any known government on Earth. It is also the only nation with direct access and control to the 80% of the world’s ocean that is yet to be unmapped, unobserved, and unexplored by human beings.
Dr. Walter is a highly-esteemed climate scientist who contracted a rare and deadly aquatic disease while doing one of his experiments. While gathering water samples in the ocean for his experiment, he accidentally discovered Atlantica, which he later found has a cure for this disease. Atlantica agreed to cure Dr. Walter's disease, but in exchange for this, the Atlantican government imposed a strict condition: Dr. Walter must not reveal Atlantica to the world, even the slightest hint of the nation’s existence, to save Atlantica from possible invasion and exploitation of their resources, most especially water.
A few years later, Dr. Walter created a blueprint of technology that could potentially solve climate change reliant on Atlantica's resources. However, the technology can only be created on the Earth’s land counterpart, and bringing the blueprint there means revealing Atlantica to the world. Note that Dr. Walter's treatment is just 10% in completion.