Commander Mike is the supreme commander of the Myan Fleet, and Commander Nic is also a commander who accompanies Mike on his missions. Both command a ship of the Beast class. Mike's ship is the Moon Spear, and Nic's is the Solar Guardian. They both come from the planet Myan, where the civilization is 10 billion years old. The Myans live for ten thousand years. Their ships are equipped with a dark light drive that can transport them through the dark space across the entire universe in seconds. As an energy source and anti-gravity modules, they use micro neutron stars, which orbit in vacuum spheres and are controlled by magnetic fields. The Myans use these technologies to function as guardians of the galaxy, keeping evil forces and hostile species at bay.

On Earth, there is a 12,000-year-old underwater city called Atlantis Prime, which is home to a hidden civilization. They are closely allied with the Myans and support each other. The commander is Altheon, and his first captains are Lyria and Corven.

The following series describes Commander Mike and Nic's first visit to Earth and their impressions and experiences in the underwater city of Atlantis Prime, as well as details from the history of the hidden civilization.