Paris, 1923: a young American photographer, Muriel Ross, finds herself documenting antiques that US Senator Tom Bryan has travelled to France to acquire. At first revelling in the freedom Paris affords, events take a dangerous turn when Muriel intuits that Senator Bryan is on a mission far more momentous, and potentially deadly, than a mere shopping trip. Asked to photograph an astonishing artefact - a piece of the True Cross on which, legend has it, Christ was crucified - Muriel is deeply moved. When rumours surface that a second fragment has been unearthed in Constantinople, she becomes enmeshed in a covert international alliance dedicated to authenticating this sacred relic . . . and protecting it from those who will stop at nothing to steal and discredit it.
