Deep within the mountains lies a vast underground prison. And at its lowest level runs a railway that exists on no map— Mika, Vanessa, and Nadia travel to the Republic of Ravencourt while tracking the Cerberon, an AI tactical platform capable of military deployment. But what begins as an investigation into illegal weapons trafficking soon leads them somewhere far darker. A secluded mountain temple. The enormous underground facility known as Abyss Nest. And a secret mountain railway used to transport human beings across borders as “cargo.” When their teammates are taken captive, Mika and Nadia launch a covert infiltration through the mountains while the Ravencourt police stage a diversion at the facility’s main entrance. Fighting their way through the underground prison, they eventually leap aboard a moving transport train. Meanwhile, the restrained Vanessa and Alicia search for their own chance to escape. And behind it all, an intelligence agency from another nation is quietly pursuing an operation of its own. Mountain infiltration. Underground prisons. Secret railways. A rescue battle aboard a moving train. Multiple plans and hidden agendas converge on a single train in the second installment of UNIT ALPHA. 10 chapters in total. The story can be enjoyed on its own, but reading Part 1 first is recommended for a deeper understanding of the characters and world.