Theodosia Throckmorton has an extraordinary ability: she can sense ancient magic. This is most useful, as she spends her life fighting curses in the London Museum of Legends and Antiquities, where her father is head curator of a vast collection of Egyptian artefacts and mummies.
When Theo's mother returns from an archaeological dig bearing the Heart of Egypt, a legendary amulet from a long-lost tomb, Theo soon realises it holds a powerful curse which could threaten all of Britain with war. Worse, there are sinister forces who wish to capture the amulet's power for themselves. Theo must summon all her courage and cunning to fight the rising chaos and restore the amulet to its rightful place...

Theodosia Throckmorton is in a fix. While attending a reception given by one of the directors of her parents’ museum, she stumbles across an old foe in the most surprising circumstances! His reappearance could mean only one thing: the Serpents of Chaos are back. Once again Theodosia will have to take on secret societies, evil curses, and dark magic too sinister to imagine, especially if it falls into the wrong hands. Blocked at every turn, Theodosia must rely on her own skill and cunning – along with a little help from her friends.