San Francisco Chief of Police Amy Zou has taken Bryan Clauser and Pookie Chang off the case of the BoyCo occult murders — which bolsters their suspicion that Zou is part of a department-wide cover-up — but the duo refuses to let go. They found the maker of the arrowhead used to kill John Doe, and through that maker, found the man who bought the arrowhead: one Jebediah Erickson. Bryan knows Erickson is the key … all he needs is a little more time to close in.