Strange things are happening at an English boarding school called House of Anubis. Popular student Joy goes missing, the school's cranky caretaker has a creepy stuffed crow and the school's attic may be haunted. When recent American transplant Nina gets thrust into the school during this time, she decides to investigate along with her new friend, Fabian, and housemates.
A new girl named KT begins school, and Eddie recalls seeing her in a vision.
Victor's furious when a parcel goes missing. He doesn't realise it's ended up in Amber's pile of birthday presents. Eddie demands that KT come clean about why she's really here.
Eddie and KT join forces to unlock the mystery of her key. Amber learns details about her bracelet from Alfie. Victor scrambles to find his lost bracelet. Eddie and KT realize Miss Denby also has a key.
Victor's under pressure to find his missing bracelet. Eddie and KT discover that Miss Denby has a key just like KT's - is there more to their new teacher than they first thought?
Amber is accepted to a fashion school in America. Fabian deciphers the bracelet's packaging. Eddie and KT seek info about Miss Denby. Jerome and Mara prepare for the business-studies competition.
Eddie and KT investigate Miss Denby, Patricia and Fabian suspect KT of working for Victor and Jerome and Mara take the business studies competition seriously and personally.
Victor steals Amber's bracelet and locks her in the tank room. Eddie and KT find more out about Miss Denby. After Amber is found, she demands that Sibuna be reformed.
KT and Eddie's suspicions about Miss Denby are confirmed, Jerome's sabotage of Mara's project backfires and Amber learns the adults are planning a mysterious ceremony.
Amber is found in the tank room; a photo of the real Miss Denby is uncovered; Amber shares what she heard the adults discussing; Victor believes he has his bracelet back.
Amber leaves, revealing what she heard in the Tank room and demanding that Sibuna is reformed – they have to stop the adults! Meanwhile Victor is delighted he finally has his bracelet – little knowing it's a fake!
The Sibunas discover the man in the tank is Robert Frobisher Smythe – what exactly are the adults plotting? Eddie resolves to reveal Denby's true identity. Meanwhile, Jerome tries to win Mara back.
The Sibunas find the real Miss Denby, who has some revelations for them… but will they get away without being caught? Jerome sets his sights on Willow. Joy boosts her confidence with a brand new look.
The Sibunas uncover the details of the secret ceremony in a very special place. They rush to rescue Harriet Denby, but discover she's gone. Jerome's love life is in a tangle.
The Sibunas learn that they must perform the ceremony themselves. With news of a school open day, it's the perfect opportunity to sneak out the tank….or is it? Meanwhile, Jerome's double life catches up with him.
The Sibunas make it to the Crypt with the tank and begin their ceremony – but Denby's discovered Frobisher has gone. Can Sibuna complete the ceremony before the adults find them? Meanwhile, Joy grants Willow a very special wish.
The Sibunas fail to wake Frobisher and are trapped in the crypt with the adults on the warpath. Patricia hatched a rescue plan, but will she manage to rescue her friends? Jerome sweats as roommates Mara and Willow get closer…
Victor confiscates KT's key and when Jerome begs Patricia for a favour she strikes a deal – if he gets their key back from Victor! The Sibunas discover that the adults have special plans for the eclipse… how will they stop them?
Mr Sweet steals the ceremonial bracelet from Eddie and a shock revelation about the descended leaves Sibuna stunned. Jerome worries that Mara and Willow working together will threaten his secret.
The Sibunas learn the history behind the man in the tank and realise they have to stop the ceremony at all costs! Jerome's list of Mara and Willow's pros and cons ends up in Joy's hands – but what will she do with it?
As the eclipse approaches, will Eddie, KT and Fabian get to their friends in time to stop the ceremony? Jerome has a near miss when Joy sends Mara and Willow an incriminating email revealing his secret.
Frobisher finally wakes up and as the Sibunas predicted, he's evil. Joy tells Willow & Mara about Jerome's two timing ways. Victor and Denby force Mr Sweet to take drastic action against the Sibunas.
Eddie has a bad feeling something terrible is about to happen. The Sibunas plant secret cameras in the gatehouse and hear a strange voice calling for help. Mara and Willow plot revenge on cheating Jerome.
Jerome, Joy, Patricia and Alfie start acting very strangely, as if guided by an unseen force. Jerome is tricked into believing he's been picked for a talent contest. KT wants answers and foolishly goes to the Gatehouse alone.
The Sibunas find Frobisher apparently dead – were they wrong all along? Jerome is humiliated in front of the class during the "singing competition". Victor visits the Gatehouse and is captured by Frobisher as his first sinner.
The adults are on the Sibunas' tail, looking for their second sinner. Patricia plans to tell Eddie how she really feels about him, little knowing that Victor and Denby have trapped him in the crypt.
Joy agrees to Mara's ultimate revenge plot – to break Jerome's heart. Meanwhile Mara discovers she is 2nd in line to inherit a Lord's estate. Eddie escapes the crypt and the Sibunas puzzle over how to unlock a mysterious capsule.
The Sibunas puzzle over a riddle which leads them to a secret room. Mara is disappointed to learn she has inherited a dog. Denby drives a wedge between Eddie and Patricia in her quest for Frobisher's next sinner.
Victor discovers the secret room and installs one of Frobisher's fatal booby traps. Miss Denby continues to meddle in Eddie and Patricia's fragile relationship. Joy's persistence finally pays off when Jerome asks her on a date.
Anubis House battle Isis House in a Dodgeball Tournament. Harriet Denby escapes from the gatehouse and KT discovers that there's an easier way into the secret room.
Joy and Jerome share a romantic moment during a very strange date. The Sibunas discover a phonograph in the secret room and it's the final straw for Patricia when she finds intimate messages on Eddie's laptop.
Eddie realizes there's a traitor amongst the Sibunas when the phonograph is destroyed, but who is it? Frobisher demands a new sinner for Ammut's collection and Mara has a new plan to shame Jerome.
Denby and Frobisher kidnap Willow but dismay at her inability to sin. Patricia plans to captures KT by offering to help clear her name. Jerome and Joy share a kiss - Mara's plan is backfiring?
KT's hopes of proving her innocence disappear when Harriet is sectioned. The Sibunas search for the artefacts with the help of a family rhyme when the phonograph is mysteriously restored. Eddie faces the real Sibuna traitor.
Willow discovers she's related to Joy and saves the day when she inadvertently provides the clue to a missing artefact. KT decides to run away, leaving Victor without his precious sinner. Fabian learns the truth about Patricia.
When Fabian's trusting nature lands him in the hands of Frobisher, Ammut's collection is almost complete. Meanwhile, Eddie realises the Sibuna traitor is not KT and Jerome shocks Joy with a surprise ending to their play.
Mara is furious as a heartbroken Joy admits her feelings for Jerome. Eddie calls on Patricia's sister for help with the missing artefact clue and KT is torn as she realises she doesn't know who to trust.
Alfie convinces KT that he's not a sinner. They rescue Eddie from Team Evil's clutches – only for Alfie himself to be captured. Joy and Mara are forced to work together when they lose Willow's cherished pet hedgehog.
Eddie and KT find the final artefact and take it to the gatehouse to destroy Ammut – only to realise they have been tricked. An evil Alfie breaks Willow's heart and Joy and Mara bond while coming to her aid.
As Ammut begins to form, Frobisher demands KT's key – but where is it? Eddie and KT find it on Willow, and realise the purpose of the keys. Jerome explains his feelings to Joy in a letter. But Joy won't read it.
Harriet sacrifices herself as Eddie and KT finally unlock the portal to destroy Ammut and save them all. KT says an emotional goodbye to Frobisher. Joy and Jerome have Mara's blessing, and Alfie has a special gift for Willow.
