Quando a adolescente Theodosia se depara com um amuleto em uma tumba egípcia, ela descobre uma nova habilidade, um poder que irá atraí-la para um mistério cheio de perigos.
Fearing her father has been cursed, Theo recruits Henry, street magician Will, and Egyptian princess Safiya in her search for a cure, leading them to the home of a mysterious thief – and a newfound world of magic and danger.
After her experiments with ancient Egyptian magic go a little too well, Theo must race against the clock to save Safiya and her father from certain doom.
Theos plan to make her parents museum safe from dark forces is thrown into chaos when Will and Henry are whisked away by an ancient portal.
Sinister forces emerge while Theo and her friends take time out for a table-tennis tournament at the Penny Arcade.
As Theo witnesses a change in the Eye of Horus magic, the Throckmortons receive a visit from an important official, and Henry tinkers with an explosive new invention.
After a magical vision leads Theo to suspect that the Eye of Horus is under threat, she must contend with the Serpents of Chaos and their masked leader, Yaret.
Theo and Will work to contain a dangerous beast, while Henry and Safiya search for a way to recover the Eye of Horus from the Serpents of Chaos.
Theo, Will, and Safiya face double trouble as they attempt a risky spell to retrieve the Eye of Horus from the Serpents secret lair beneath Cleopatras Needle.
As the total eclipse and the Throckmortons fundraising party collide, Theo and her friends must work to keep the ever-enigmatic Eye safe from the Serpents.
After the Eye whisks them off to Egypt, Theo and Safiya race to reach the Staff of Osiris before the Serpents of Chaos catch up. Back in London, Will and Henry make use of a magical rope.
After securing the museum against the Serpents, Theo uses her heightened abilities to get an edge in botany class. Later, Henry faces off against a dangerous enemy.
With the Serpents of Chaos magic now unleashed unto the world, Theo and her friends race to break Yarets spells before chaos rules forever.