We have said that Rosebyrne's story runs on a choose your own adventure engine, effectively a full gamebook turned into a boardgame, allowing you to collectively influence the outcome of the story. But what is that story?

It starts with a sinister cult of necromancers and death worshipers have invaded the mansion. They are led by a twisted man with one thought on his mind, to find a powerful artefact that he believes can help him
channel the power of his dark god:

For almost a century, the mansion of Lord Kallidus has lain empty and abandoned after he and his family mysteriously disappeared. Over the years, more and more adventurers have travelled to the town of Rosebyrne to take a stab at the nearby Manor’s hidden wealth and unknown possibilities.

The town is reaping the benefits from newfound interest in the remains of their former master’s house, but some say that darkness has crept back into the old home. A fell wind drives through the town at night, and wicked things creep around its outskirts. Rumours swirl of lights shining from the manor house and worse…

The old Rosebyrne Manor is a gigantic mansion built off the northern edge of the town. Many of its rooms have lain undisturbed for a century. Others are under the influence or even inhabited by dark and sometimes disturbing forces.

No one has ever been able to properly map the labyrinthine halls of Rosebyrne Manor, as the portion above ground is merely the tip of an iceberg of granite chambers and cobwebbed passages.

Things dwell in the deep parts of the Manor, some lone horrors, and others as rag-tag bands of creatures, and all of these things are hungry for food, wealth, and power.

In the very bottom pits of Rosebyrne Manor, things too foul for the light of day stir.  These are the unholy forces of the Despised, a cult of necromantic fanatics and dark debauchery.  Shrouded in black robes, the shrunken and leathery-faced followers of the Despised cast blood rites in the dark basements and scry upon the living, guarded in the dark by undead sentinels. Flesh-eaters and ghouls prowl at their behest and shambling shells of former House Kallidus servants dig deeper for them, always digging and sifting the detritus in search of something. 

Yuroth the Ashen. Yuroth the Dark.  Yuroth the Forsaken.  Each describes an unholy being full of ambition and hatred sewn into his dark heart. Yuroth has come to Rosebyrne Manor for one reason: the Avatar Suit.  He wishes to combine the power of this awesome artefact with the one vestige he has of his god, an unliving arm of brass and silver attached to Yuroth by his right elbow.

He believes that the mechanical arm will grow and transform if intertwined with the divine properties of the Avatar Suit. It is this wish to achieve that drives the evil being, as well as a chance to be seen in his master’s eye.