The Heights are a gorgeous utopia. The Depths, a filthy industrial wasteland. Our heroine, raised in the Heights, has nothing but contempt for those below. Now an observation mission requires her to descend into that world, and the gears of fate have begun to turn.

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.

The stories of Ulrik, Adage, and Fin take place alongside the younger king Jevite in this strange land. Meanwhile Eltcreed, Ines, and Yune clear the way to Cainabel's future with the elder king Jereme. You can enjoy this episode and its endings from two points of view, depending on which party member the heroine travels with.

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 visual novel 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!

- And of course, it comes with plenty of Steam Prison bonuses, too!
- Multilingual subtitle support included for voice extras.
- 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.

Cainabel Story plot summary

Two years have passed since the unification of the Depths and the Heights, and the creation of a new government.

With those in the Heights now free to choose their own romantic partners, our heroine spends her days ducking meetings with potential suitors arranged by her mother. One such day, our heroine takes on a new mission. Joining an expedition tasked with investigating what lies beyond the fog encircling the Depths, she embarks on a journey into the unknown along with Fin, Ulrik, and Adage...

A brand-new world unlike the Heights or the Depths—Cainabel. Through fresh encounters and exposure to different values, our heroine, still a stranger to love, will build new relationships with her companions. Strange experiences and encounters in a foreign land.

Before long, changes begin to appear in their relationship as well...

A New Theory plot summary

The Heights, a beautiful utopia in the sky, and the Depths, a filthy mechanical city. Those living in the Heights have immense power, and despise the Depths. Born and raised in the Heights herself, our heroine never had much fondness for them. But after being ordered on a mission to observe the Depths, she finds herself caught up in a cruel twist of fate.

Framed for the murder of her parents, our heroine is sentenced to the Depths, where Sachsen, leader of the HOUNDS, has been waiting...