The Gotham River was a Black River.
Before it became a commercial city, it was a typical industrial city. Years of pollution had permanently changed the color of the river that stretched across the city. Now, no matter how much money people spent on it, it could not be restored to its original appearance.
Many things in the world were like this. It was easy to go from clear to turbid, but it was difficult to go from turbid to clear. It was easy to turn from white to black, but to turn from black to white...It required a high price.
Gululululu
The sound of the propeller rotating underwater was accompanied by bubbles as it floated to the surface of the river.
In the dark of the night, no one would notice what was happening in the wide Muddy River.
At this moment, a "bat submarine"... If you would like to call it that ... Was slowly moving forward on the river bed.
And the person driving it was obviously Batman.
