Steeped in witchcraft, occult mysticism, and medieval medical malpractices of the early 19th century we find a haunting roguelike gameplay experience featuring a patient of the Mostyn House Asylum known only as Nightingale. It is this poor unfortunate soul that finds herself in a perpetual dream or nightmare, if you will. Doomed to repeat her horrific attempt at escape until she finds the key to getting out.
This entails both combat, and a stealth approach as not everyone who resides in this place for choleric and psychiatric help are friendly. Avoiding conflict, and sometimes engaging in it while amassing the items necessary to stave off various afflictions, and death are the only way to wake up from this hellscape that was 18 years in the making.