Darken is set in a bizarre, mysterious, and violent unknown world with danger and death around every corner. After a young woman is accosted by a dying warrior in the middle of the street, a bizarre incantation propels her into the realm of Darken - a violent prison-like world of labyrinthine...
To celebrate Ms. O's 100th anniversary, the agents go back in time to witness her last case as an agent. However, something goes wrong and they change the future for the worse.