The day of the Ball. Amber, Nina and Fabian have had the same dream of the Spirit pushing Nina into the Chasm. The night of the Ball. Amber, Nina and Fabian complete the hopscotch challenge but there's a bigger test to come.
Senkhara leaves her mark on Nina, and Fabian’s godfather, Jasper, advises her about the mark and the Mask. Nina thinks the Mask is in the house – and then the dollhouse opens to reveal a map. Poppy researches her and Jerome’s father.
Fabian keeps the Jackal mark a secret, while Nina’s map leads them to a secret door in the cellar, but she needs the right code to get in. Amber saves Nina and Fabian from Victor, and insists they tell her what’s going on.
Jerome's dad wants him to visit him in prison. Patricia finds out about Eddie's bet, and Joy and Mara sign up for the school website. The Sibunas practice laying the beam, and Victor finds the lock in the cellar and map of the tunnels, which he copies.
The Collector creeps into the Library. Jerome and Alfie bet Eddie that he can't get Patricia to dance, and Eddie wins. Nina flees to the tunnels, while Jerome reads the letter his Dad sent to Poppy. Nina is angry with Fabian.
