In the conclusion of the Devil We Know campaign arc, you are called once more to Cassomir, where a mass abduction of the residents of Swift Prison has the entire town in a panic. Venture-Captain Hestia Themis once more partners you with an Aspis agent to see what link the Swift Prison event has to the earlier kidnapping of a Pathfinder agent. You will explore an empty prison, delve the tunnels below, and come face-to-face with the source of Cassomir's troubles in a vile grotto deep beneath the city.
Rules of the Swift is the fourth and final installment of the Devil We Know campaign arc.
