When the British Museum gets Sidney and Nigel to help search at Tudor sites for a ring of king Henry VIII, Nigel is confronted with his self-confident elder brother, Preston Bailey.

Jerusalem 1099: crusaders find the Tau cross, but it evaporates the one touching it. Paris 2001: Allan comes to Sydney, sating he has 12 hours before a virus kills him unless he delivers the Tau to a blackmailer who has the antidote