While Ruksy is giving a tour of the magical Museum, a suit of armour escapes. Kyra wants to help put the armour back before it exposes the magical world, but Imogen has been struggling to teach Kyra how to "jump" and can’t see that she’ll be any use. But Kyra comes up with a solution that no one else has seen.
To help Ben's career, Lily casts a spell over a music video that Peter has filmed, causing everyone who sees the clip to sing and dance.
In search of the Third Key, Darra and Kyra travel back in time where they are taken prisoner by Magnus Sorenson, a Tri-ling who is also seeking the Temple of the Purple Lotus.
When Kyra and the Bureau go to Vietnam to find the Third Key, they bring to life a giant cobra statue that chases them back to the Library, resulting in Kyra getting a vision of the Purple Lotus.
Maxwell is suspended from teaching, and Apinya, a magical archaeologist, takes over the school. To fix Ladder, Lily, Ruksy, Peter and Imogen venture into the fairy tale book to secure enchanted wood.
While Lily and Ben are on their first date, Kyra and the Bureau attempt to capture a magical bug whose bite causes the victim to tell the truth. Peter and Ruksy get back together.
On Magic School Sports Day, the rivalry between Maxwell's School and the Crowther School is thrown into chaos when Kyra becomes the unwitting centre of a magical disruption.
Maxwell and Kyra turn to Apinya for help to understand Kyras's connection to the Keys. To improve her chances of selection for the Magical Intervention, Imogen attempts to acquire a fairy ability.
Lily insists on helping Mathilda with Kyra's surprise birthday party, causing chaos; a magical object forces Kyra to use Orb Magic, which gives her a vision with the whereabouts of the Third Key.
Imogen becomes suspicious that Apinya is not who she claims to be; while trying to get her stepfather to accept Darra as her boyfriend, Kyra makes an extraordinary discovery about her birth father.
Maxwell and the two keys are kidnapped. Kyra retrieves the Third Key from the Bangkok warehouse, but it jumps her to the Temple of the Purple Lotus where her Orb Magic is drained.
As the Purple Lotus begins to disrupt fairy and elf magic everywhere, Kyra makes an astonishing discovery about her Tri-ling heritage.
Kyra's attempt to get Orb Magic back from the Purple Lotus fails, so she and the Bureau travel back in time and stick to the original plan to prevent the Lotus from draining all magic.
As the Purple Lotus drains all magic, revealing the existence of the magical world to humans, Kyra and the Bureau risk everything to destroy the Lotus and prevent the end of elves and fairies.