The city of Daggermark is best known for its poisoners and assassins, who maintain active guilds that enjoy the full respect of local authorities. Local venture-captain Istivil Bosk prefers to keep his head down and stays out of their affairs, but he has recently learned that a Pathfinder agent has been targeted for assassination. Can the PCs enact the venture-captain's daring plot to save this agent without becoming the assassins' next victims?