Vatican City, 29 September, 1978. The world wakes to the shocking news that Pope John Paul I is dead, just a month after his accession. Thirty years later in London, young journalist, Sarah Monteiro, receives a mysterious package. Enclosed is a list of names and a coded message. Moments afterwards, a masked assassin attempts to silence her for ever. It seems Sarah holds the key to unveiling a deadly secret - a plot that implicates unscrupulous mercenaries and crooked politicians, and which goes to the very heart of the Vatican. Sarah has no choice but to run, forced into a ruthless game of cat and mouse. She can trust no one, especially as her father's name appears on the incriminating list. Sarah finds herself at the centre of a world-wide conspiracy, whose keepers will stop at nothing to protect it.