Levels Ascension

The dome protects us. From what I have no idea. I do know that there are special forces that guards us from what lurks outside. They're called Levels Ascension. For it to function there must be ranks in which each has a specific job.
"Rank Alpha, Gheco, Nover, Oskar and Tango."

When twin siblings Sapphire and Isaac joins the Levels Ascension, they see it as hope. That means no more working at a boring coffee shop or hard labor at the mechanics. They will have a roof over their heads, a warm bed and a heavy meal every day. But the twins are more involved in the case than they thought and soon they will have to face the truth that will rip them both apart.