With an ancient Iroran relic in hand, the Pathfinders must make a long river voyage to the inland nation of Shokuro to return it to the only person who can reactivate the long-dormant artifact. Whether dangers take the form of goblinoid menaces on the shores of Kaoling to the north or the powerful armies of Lingshen to the south, the Pathfinders' journey will be anything but a pleasure cruise. Can the PCs survive hostile waters to safely reach their destination, or will they fall victim to the perils of river travel in Tian Xia?