Theodosia

During one of her parents' digs in the Valley of the Kings, Theo and brother Henry stumble on the sarcophagus of Amenemhab, great general of pharaoh Thutmose III. When Theo touches Amenemhab's Eye of Horus amulet, she has a fleeting vision of a woman in the desert.

Certain that Alistair has been cursed, Theo is desperate to find a cure. But no-one will believe magical curses are real. Besides, Alistair and Henrietta have more important things to worry about - the arrival of Safiya, an Egyptian princess, and her influential uncle.

Trapped in Vincent's secret basement by the transformed Vincent/snake, Theo and company manage to flee by crawling up the coal chute. Theo nabs Vincent's magic book on the way out, hoping to use it to find a cure for her father's curse.

Theo makes a plan to put the museum's magic safe into effect. Unfortunately, Clive wheels in an enormous Ancient Egyptian false door, covered in powerful magic. Matters go from bad to worse when Will and Henry accidentally open a portal and are swept away.

Theo has a vision of the Penny Arcade surrounded by flames and filled with chaos. She sees a man in a mask, looking straight at her, asking who she is. Determined to find out what's going on, Theo heads off to the arcade with Henry.

Theo is checking all is safe on the Egyptian Floor one night when she discovers that the Eye of Horus's magic seems to be changing. Next day, Henry tries to persuade Alistair to use his latest invention. Unfortunately, the machine has more than a few teething problems.