The fifth gospel

2004. As Pope John Paul II's reign enters its twilight, a mysterious exhibit is under construction at the Vatican Museums.

A week before it is scheduled to open, its curator is murdered.

The same night, a violent break-in rocks the home of the curator's research partner, Father Alex Andreou, a Greek priest who lives inside the Vatican with his five-year-old son.

When the papal police fail to identify a suspect in either crime, Father Alex, desperate to keep his family safe, undertakes his own investigation.

To find the killer he must reconstruct the dead curator's secret: what the four Christian gospels - and a little-known, true-to-life fifth gospel known as the Diatessaron - reveal about the Church's most controversial holy relic.