When famed curator Giovanni Montefiore is shockingly murdered at the Italian Opera in Rome following his bold proclamation regarding the authenticity of the True Cross, there are many suspects, but suspicion falls heavily upon his nephew, Mario Montefiore.

With his American girlfriend, actress Catriona Benedict, by his side, they embark on a perilous quest for truth and to uncover the real killer, leading them through some of Italy's most iconic and glamorous cities.

But as the body count rises and the relentless pursuit of both law enforcement and paparazzi intensifies, they find themselves fleeing to Florence in search of the True Cross, which they hope holds the answers they need. Amidst the ancient streets of Florence, Catriona assumes a daring new identity, delving into a world of shadows and deception.

Will they uncover the secrets surrounding the True Cross before it's too late?