In 2008, Decca Records had a worldwide smash hit with a group of Austrian monks singing Gregorian chant. Now the company is hoping to repeat their success, this time with an order of nuns. Record executives Oliver Harrop and Tom Lewis travel the world in search of the finest singing nuns, with the aim of signing them up and taking them to number one in the charts. From Ireland to the USA via France and Spain, no stone is unturned in the quest to find the world's most heavenly voices. But there is a problem; many orders of nuns live in communities hidden from the modern world. Will Tom and Olly be able to persuade any to swap their solitude for the media attention and fame that could result from recording a hit album?