Inside the Inner Chambers—the opulent haven reserved for women meant solely for the sovereign—every role from the lowest housemaid to the most senior concubine carries a heavy workload. Asa and Kame, who arrived together on their first day as attendants, quickly bond; they pledge to face whatever obstacles arise as they embark on their magnificent new existence.
Amid complex hierarchies, eerie rites, and hidden truths, the Inner Chambers erupt into chaos when bizarre events disturb preparations for an imminent ceremony. While officials from the shogunate are sent to probe, a mysterious Medicine Seller bangs on the gates and insists on entry into these forbidden rooms, arguing that the danger is far greater than anyone had realized, and the stakes are higher, for everyone now.