Robin hides in Raven's Flat, protected by Michael, Sakaki, and Karasuma who are seeing parallels between Robin and the woman she replaced, Kate. Amon's absence causes Robin's trust in him to waver, but a visit from Master soothes her fears. When an armed force attacks headquarters, Robin is forced to flee, alone.

Nagira meets with a contact in Walled City, who shares a rumor about a "Fragment of Wisdom" that was left behind by the witch Methusaleh, which many, including Solomon Headquarters, are searching for. STN-J notices an increase in murders of witches in Walled City. Robin remembers something she had left in her apartment, only to find it gone. Nagira's search leads him into trouble, but Robin saves him with Michael's help and they realize the nature of the "Fragment of Wisdom".