Deep Sea Vestiges

The world has become strange and bizarre due to an unknown catastrophe, where most of the land has been submerged by seawater and the remaining parts of humanity can only survive on islands. For unknown reasons, something abnormal has contaminated the entire world, and strange objects or phenomena always appear inexplicably. Humans have vigorously developed steam-powered technology to connect islands with ships, study abnormalities, and survive in this abnormal world.