Freshly-minted night shift driver Vanessa partners up with veteran Nikki, who refuses to discuss anything to do with the dragon threat—even after they share their first shocking 'Code 45' experience together. Determined to dig into the mystery, Vanessa enlists the help of her DJ roommate Pierre-Yves, and discovers not only his surprising ties to the 'scatter' crisis sweeping the tunnels, but also a link to a dark secret about her own family's past.