Mick finds out Mara cheated for him and falls out with her. Amber discovers a secret message written behind the wallpaper - "Help me, Sarah Frobisher Smythe." Fabian, Nina, and Amber record the cylinders onto a Dictaphone. The young girl on the recordings mentions a murder. They suspect that the girl may be a young Sarah. Amber and Nina go to the old people's home to visit Sarah and confirm that she is, in fact, the girl from the recordings. Amber comes up with a name for their gang - "Sibuna" (Anubis backwards). They make it official with a ceremony by the woods after which Fabian manages to open the puzzle piece, revealing a riddle. Meanwhile, Jason finds Joy's broken mobile phone at the school bins; he searches for more clues but finds nothing. Guest Star: Francis Magee

Patricia spots Nina's necklace and recognizes it as the Eye of Horus and calls Rufus to inform him that she has seen the Eye of Horus. Sibuna opens the next puzzle piece to reveal the second riddle. They work out that it refers to a fireplace, so they begin to check every fireplace in the house. Meanwhile, down in the cellar, a strange ritual is taking place involving Victor, the teachers and a select few others. The teachers confiscate Patricia's phone and find out that she is in contact with Rufus Zeno - a man known to them as "The Betrayer". Sibuna manages to open the old stove in the kitchen with Nina's pendant, and it leads them down into the cellar where they find the next clue - an old tethering ring with a code on the inside. While inspecting it, Victor comes down; they manage to hide in an old cabinet, and from their hiding place see him drink a strange liquid and toast to "life."