Motivated by money and revenge, Perry hosts an exclusive masque-rave that takes a twisted turn. A young Roderick pitches a revolutionary new opioid.

In charge of the Ushers' publicity, Camille conspires to spin controversy in her family's favor and expose the grim details of her sister's experiments.

A furious Frederick sets out to handle unfinished business. Madeline receives an ominous message at an old haunt. Dupin grows wary of Roderick's motives.