The early 20th century. A flood strikes a large American city on the banks of the Mississippi River. In a certain bar, several people find themselves trapped together in a small space, caught in a torrential downpour. They learn from weather reports that the storm has destroyed the dam and floodwaters have submerged much of the city. A rumor spreads that everyone taking refuge in the bar is doomed to die. Faced with the imminent danger, strange transformations occur in the people: wealthy cynics...