Nimbus

Every 103 years, a giant cloud passes by, and completely covers a specific part of Earth in extreme darkness. For 9 and a half years, there will be no daylight at all. No one knows why or where this came from, and almost no one knows about it. But there was a story that in 1901, the world was covered in absolute darkness, and that the people got brainwashed, and lost every memory they had. 103 years later, Denzel found himself in pure darkness at 10:09 am.