After stumbling upon a mysterious amulet in an Egyptian tomb, turn-of-the-century teen Theodosia “Theo” Throckmorton develops magical powers, throwing herself – and her family – into a perilous ancient mystery.
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.
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, Will, and Safiya face double trouble as they attempt a risky spell to retrieve the Eye of Horus from the Serpents’ secret lair beneath Cleopatra’s Needle.
As the total eclipse and the Throckmorton’s 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.