A small party must split off from the wagon train to cross a lowlands that turns into a swamp when it rains. Chris assigns Flint along with Bill and Charlie to lead the small group. They are early for the wet season as rains can turn the area into an impassible swamp. Flint led a similar group the year before but only he and Chris know the details. A local Indian tribe warns the group not to cross the lowlands because of a swamp creature they have heard but not seen. As they enter the lowlands a rain storm breaks out causing Flint to order the people unload anything they don't absolutely need in order to get through. This angers the group but they reluctantly follow his orders. As they move forward Flint comes across part of a wagon that previously tried to cross. They soon start to hear noises that sound like music from an organ or piano. When Flint doesn't return from checking on the sounds, Bill and Charlie go looking for him followed by the others the next morning.