Watch on Soap2day. In the final days of the Edo shogunate, a government commander enters Edo Castle to inspect the Ōoku. Ignoring warnings, he steps into a forbidden room where, 200 years before, Lady Oyuki, a favored concubine, was forced to commit suicide by Tokugawa Tsunayoshi over a suspected affair. Consumed by vengeance, her spirit continues to haunt all those involved in the tragedy.