Since its release in 1984, George Michael and Andrew Ridgeley's Last Christmas has gained four billion audio streams, had one billion video views and attained the number one chart position in 16 countries. This documentary delves into the inside story of the song's creation and its enduring appeal, as Pepsi Demacque-Crockett and Shirlie Kemp reunite with Andrew to revisit the stunning snow-covered backdrop of Saas-Fee in Switzerland where its iconic video was filmed. They reveal never-before-heard stories from the video that have remained a group secret - until now. Mary J Blige, Bob Geldof, Neil Tennant and Sam Smith are among those giving their views on the song's themes of unrequited love and loss.