When Henry, 5th Marquess of Anglesey (Callum Scott Howells), a flamboyant and eccentric aristocrat, arrives in 1890s North Wales to claim his inheritance, he shakes up the upper-class elite with his theatrical flair and defiance. Alongside his spirited cousin Lily (Ruby Stokes) and loyal butler Gelert (Rupert Everett), Henry navigates suffocating traditions, scheming relatives, and the long shadow of his estranged father, all while trying to carve out his own identity as a member of the aristocracy.