A new wine film claiming to 'raise the curtain' on how wine is produced is set to open the Napa Valley film festival this year.

Napa Valley film festival organisers said their screening of Somm: Into the bottle would be the wine film’s world premiere.

It is screenwriter and director Jason Wise’s sequel to ‘Somm’, which attempted to capture the intensity of the Master Sommelier training and exam programme. Somm also opened the Napa Valley film festival in 2012.

This time, Wise has broadened his sights to include how wine is made, who touches the bottle on its journey to your dinner table and how wine prices are decided. It also includes wine history.

‘Somm: Into the Bottle raises the curtain into the seldom seen world that surrounds the wine we drink,’ said a synopsis of the plot published by Samuel Goldwyn Films, which made the documentary movie.

‘This is a never before seen look into the world of wine,’ it said, adding that viewers will see some of the world’s most rare bottles of wine opened to see how they age.

Wise said, ‘Somm was a great introduction into the world of Sommeliers but I still wanted to delve deeper into the profession and the wine industry as a whole.’

Napa Valley film festival is scheduled to run from 11 to 15 November this year, featuring 125 independent films showing across Napa, Yountville, St Helena and Calistoga.