England, 1620. To strike a blow against the Patriarchy, six women perform a dangerous rite in an abandoned priory. Through their art, they commune with Terpsichore, Greek muse and patroness of dancers. Starving demons slither across the moors; monstrous nuns shriek in the infirmary; and within the Attic, a great unravelling awaits. The fate of the world rests in the hands of the player characters. Will they bring about an egalitarian utopia? Will they skulk away in the night, pockets bulging with treasure? Will they bring about the destruction of all things? Will they find the Tract of Teratology, a randomly-generated creature-summoning ritual with 3.6 trillion combinations? After this adventure, nothing will be the same. The adventure is intended to be used with the Lamentations of the Flame Princess Weird Fantasy Role-Playing game, but is readily compatible with many other traditional role-playing games.