The Sibuna gang return and have a midnight feast in the attic where they find a dollhouse. Victor searches for The Book of Isis – an ancient tome that will tell him how to recreate the Elixir. Nina looks for a new hiding place for the cup, but is it safe?

Jerome is blackmailed by a 7th grader. Nina has a dream, inspired by a riddle. Alfie saves the dollhouse, the gang finds out who is blackmailing Jerome, Senkhara tells Nina to find the Mask of Anubis, and Victor is thinks he will find The Book of Isis.

Mara is upset that Mick’s family is moving, Alfie tries to impress Amber, and Fabian writes a poem for Nina. There’s a replica of the Mask of Anubis in the Exhibition, so Nina and Fabian go check it out.

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.

Amber joins the Sibunas as they find the antechamber and amulets. Mara’s upset about Mick. Trudy’s leaving to work in the Exhibition and Mick is leaving for good. Meanwhile, Jerome decides to hire a Private Investigator.

Amber’s temporarily blinded by a strange beacon booby trap. Nina and Fabian discover the only thing that can protect them. Nina and Fabian explore the first Task in the tunnels, set by Sarah’s father Robert.

New boy Eddie arrives and makes an enemy in Patricia. Amber surprises Nina by finding something Nina’s been looking for. Eddie causes trouble at Jerome’s fundraiser day, and things get worse when Mara figures out it’s all a scam.

Nina and Fabian puzzle over the mysterious cube that they found in the tunnels. Nina figures out how to make the mysterious cube into a key to unlock the first door in the tunnels, and soon the Sibunas face their next Task.

The Sibunas’ next Task is a deadly Egyptian version of hopscotch. If they get the sequences wrong then the ceiling starts to descend. The gang figures out the safe sequence to cross the deadly hopscotch. Then, when Nina hears Senkhara, she follows.

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.

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.

Jerome's dad wants him to visit him in prison. Patricia finds out about Eddie's bet, and Joy & 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.

Victor & Vera hide in the cellar & see Nina entering the code. Patricia’s revenge backfires, and the Sibunas enter the antechamber. Victor is blinded by the beacon flash. Poppy's Father wants a prison visit. The Sibunas cross the chasm.

Victor’s sight returns & he finds a passage. Jerome goes to visit his Dad, but Poppy has beaten him! The Sibunas find a crawl tunnel. Fabian saves Alfie from the tunnel. Amber & Alfie break up. Victor spots the amulet & takes all pupils’ jewelry.

Victor explores the tunnels, the Sibunas plot to get the amulets. Jerome’s father has a mission. Vera finds the Book of Isis. The Sibunas plot to keep Victor awake. Jerome begins his quest & Fabian tries to tell Nina he wants to get back together.

Jerome tells Mara about his dad’s mission. Now the Sibunas have the amulets back, they set out to defeat the tunnel of terror. Nina opens the nextTask tunnel. Meanwhile Jerome embarks on a wild goose chase and Vera meanwhile finds a spare amulet.

Amber gives Fabian advice about Joy. Alfie’s goose eats Jerome’s dad’s gem. Trudy realizes that Vera is not all she seems. Trudy shares her suspicions with Mrs Andrews. Victor and Vera succeed in swapping the spare amulet. Patricia’s amulet falls off.

Mara investigates a ‘profile’ on the website.The goose passes the gem, but Mara drops it. Patricia wears the fake amulet. As the Sibunas explore the spider’s web task, Patricia arrives to warn them. Mr Sweet tells Mara about Vera's job.

Jerome has Patricia’s amulet. Nina & Fabian have to get the gem and do a trade for the amulet. Nina sees a riddle. Jerome has the gem, but has a problem. Mara finds the missing chapter of the Book of Isis. The Sibunas find a clue to the Spider task.

Victor is translating The Book of Isis. Fabian takes Joy out. Nina decides to the Web chamber. Eddie & Patricia misbehave in class. Jerome wants the shield, so he’ll have to win it back. Mara finds out Vera’s résumé is a lie & Nina learns Senkhara’s name.

The Sibunas complete the web task. Nina figures out she's responsible for unleashing Senkhara. Victor can solve the latest task. Jerome needs help to win back the Shield. Victor is seen with chemicals. Mara might oust Vera on the school website.

Alfie is ping pong coach and Vera’s upset with the article. Eddie plans a prank on Mr Sweet. Victor completes the task. Senkhara is furious. Mara & Vera have a hearing about Mara’s claims. Fabian thinks he's solved the task, Eddie’s Mr Sweet backfires.

Mara is expelled. Jerome fires Alfie. Vera bribes her witness. Mrs Andrews resigns to save Mara. Patricia learns a secret & Nina gets bad news. Jerome’s tournament goes badly. Nina’s words are twisted by Senkhara. Nina has a vision of what may happen.

Jerome’s opponents used crooked balls. Victor explores the next Task. Nina realizes her words have hexed her friends. Victor has his own amulet. Eddie tries to speak to Patricia. Alfie plays on the horns. The klaxon sounds again, the ceiling cracks.