The world is ending, and humanity is not going down without a fight. Betty, the newest goddess and planet, is in search of her Oracle; Dr. Phineas Fletcher must find some answers by paying his father, and Calliope wrestles with her new identity.

#GreyMatters finds the gang with some new members—Truly Scrumptious, Sarah, and Allison all face challenges of their own, but the biggest challenge is yet to come. With the Wire after every one and a crazed and unstoppable Carmen on the loose, who will get lost at the end of the world?