In the far far from our galaxy there is another galaxy... a different world with different structures and spaceships
There is a world between the sky and sea...spaceships can fly and swim. there is no limitation between them only a very slim skin acts as a border...u can go from one place to another in the blink of an eye.
Spaceships break this boundary and go wherever and whenever they want.

All this happened after a huge scientific revolution and human was able to achieve the technology of traveling in the galaxy and far away.
As you know, there is always a need for an energy source and there is a planet full of new energy in this galaxy where all the ships are coming to replenish energy.