In 1870, Lírio knew her life was about to be decided by others unless she took action. The daughter of a gambling addict, her options were scarce: marry against her will or serve her aunt. But a job offer as a governess leads her to the mysterious mansion of Helena Magalhães, a widowed viscountess. What seemed like a chance to start over soon turns into an enigma.
As Lírio discovers that the mansion is a refuge for those who have no place in the outside world, Helena's brother-in-law threatens to take everything, spreading rumors to destroy the viscountess. With a daring plan involving all the residents of the house, Lírio knows she needs to reverse the gossip and protect Helena.
"The Beast of the Mansion" is a sapphic version of "Beauty and the Beast," in which two women defy 19th-century Rio de Janeiro society, determined to be free at any cost.