The story centers on a historical flood in Su'ao, with the floodwaters surging in, dispersing through the streets and alleys, navigating between the realms of fiction, history, and everyday life. The main visual design features three levels of water height, reflecting the narrative stages of "dispersal," "submersion," and "sedimentation" described in the text. These stages are subtly represented by embossed elements, hinting at the objects that vanished beneath the water.