This story takes place two years after the "Grand Ending" from the original Steam Prison.
While riding the "buggy" invented by the engineer (and information broker) Ulrik, our party arrives in the new land of Cainabel, where they meet a pair of kings. The story unfolds from there.
This release also includes an additional story titled A New Theory.
In A New Theory, our heroine must confront the injustice of her world.
She makes contact with the HOUNDS in order to clear her name, and decides to forge a new path for herself…

Highlights:
◆Enjoy stories from two different worldviews in one package!!
1) The Cainabel Story picks up from the Grand Ending in the original game.
The Cainabel Story introduces two new characters, each with their own ending!
Not only that, but you can get engaged to each character at the end of their route...?!

2) Sentenced to the Depths, our heroine forges a new path in A New Theory.
The story revolves around Sachsen, the hard-nosed leader of the HOUNDS.

◆Includes a minigame called Petit Prison that features super-deformed characters and lively voice acting!
This spot-the-difference game is packed full of adorable chibi characters and loaded with reaction voices!

・Multilingual subtitle support included for voice extras.
(Japanese/English/Traditional Chinese/Simplified Chinese)
・Includes a summary of the events of the Grand Ending for players starting with this title, or for those who want a refresher during their downtime.