Lady Black and the mysterious creature of the night

While Lady Black has come back to life for her 1100th year, she's tasked with a duty to free the missing trapped souls of the living and the dead. Her return is not an easy one as she may be required to work with one of her greatest enemies of their time. Lady Black is rather misfortunate to realize that she has lost her memory, making her task even harder. Only upon a successful completion of her task will she be allowed through the gate of the afterlife.