The Master of Revels is a mini-campaign in the city of Hollin. Thanks Fred, Karen, Keith, Scott, Tracy!
Geoffraie, Gwyneth, Hughe Lane, and Roland Gray meet their friend Burgess for dinner at the Mooncalf. Burgess is attacked there, and they deduce that Phyla House vampires are responsible. The party discovers that Mr. Burbage's (actually Cankerblossom's) tontine has turned Hollin's rich against each other in a winner-take-all fight, including Christopher Cotton. Talking with Vesper Cotton and his smith Kazola, they agree to free Christopher Cotton from the secret police prison if Kazola will help them against Phyla House.
The party, now with Marina Gale, sneaks into the secret police prison to free Christopher Cotton. They find the prison is in disarray, and everyone there is infected with a mysterious psychic illness; prisoners and secret police Inquisitors attack the party and feed on their minds. They find a trove of secret police mail implying that the secret police chief Durer had the previous Master of Revels Ella killed, that the secret police Spy chief Guilder is the Hobnail kingpin Lars, and that the secret police monitor the party and their friends.
Continuing in Hobnail Prison, the party finds the secret police - Alisandre, Durer, Guilder/Lars, and the globster - interrogating Christopher Cotton. The globster feeds on Geoffraie and Marina's minds but the party defeats them. The Black Rose assassin Lavinia suggests that with Guilder/Lars dead, the party take over the Hobnails in disguise. The Company chairperson Melina says the Master of Revels Helmholtz is missing. The Company Stakeholders and Kasskar prepare the party for Phyla House's vampires.
The party finds the Moonwell, a large colony of vampires underneath Phyla House's manor. They initially plan to exterminate all of the vampires there, but after an alarming fight with the first vampire, they refocus on just finding Lolani Phyla. They free Quaternion Society mathematician Manfred Unger from his seventeen-year captivity there. They follow the Moonwell's spiral stair down to the Temple of Night, where Lolani and her wingman attack; Marina saps them with the Shareholders' Shafts of Sigrid and the party kills them.
The party investigates Helmholtz and Parja's disappearances. They find that Miss Miller's girls defeated Parja's and Woodhouse & Herschel's bills in the Great Council with their feminine wiles; that the girls similarly defeated the Anti-Banqueting Bill that Helmholtz wrote to circumvent them; and that enraged, Helmholtz and the others went to Miss Miller's Tuesday night salon to confront her. The party finds Parja dead in Miss Miller's Mooncalf apartment, and fights butchers cutting up Parja's body.
The party meets the seven strange women, and they discuss Gwyneth's sword Nadim, taking over the Hobnails, Hughe's loyalty, the Globster's infected, Geoffraie's background, and blowing up the Moonwell. In the Mooncalf scullery, they find two more butchers grinding up Helmholtz, Woodhouse, and Hershcel for the Mooncalf's stew, and defeat them. They enter Miss Miller's opium pipe dream in the Mooncalf opium dens, and they kill her when Gwyneth decides to take over the Mooncalf as a new Miss Miller.