Marc Fennell's investigation draws to a close and reveals a dark history of crimes far greater than any art heist.

From a bush monastery to a presidential palace, Marc Fennell sets out on an international treasure hunt to chase down the sensational rumour behind a 40-year-old art crime mystery.

In 1986, thieves ransack a Spanish monastery filled with priceless treasures in outback Australia. Marc Fennell investigates this strange art heist.