C432 A fault confessed is half redressed, works together to great block (4)

Finally, they found an empty island in a valley that was intersected by land and water. Actually, it wasn't an empty island, it was just that a few days ago, it suddenly rained a heavy rain, the water's momentum quickly increased, the original river that flowed in all directions turned into a strange island in the middle of the hills between the rivers. He remembered that when he was a child