Theodosia Throckmorton has her hands full at the Museum of Legends and Antiquities in London. Her father may be head curator, but it is Theo - and only Theo - who is able to see all the black magic and ancient curses that still cling to the artifacts in the museum. Sneaking behind her father's back, Theo uses old, nearly forgotten Egyptian magic to remove the curses and protect her father and the rest of the museum employees from the ancient, sinister forces lurking in the museum's dark hallways. When Theo's mother returns from her latest archaeological dig bearing the Heart of Egypt - a legendary amulet belonging to an ancient tomb - Theo learns that it comes inscribed with a curse so black and vile that it threatens to crumble the British Empire from within and start a war too terrible to imagine. Theo will have to call upon everything she's ever learned in order to prevent the rising chaos from destroying her country - and herself.