In London, a 90-year-old sings the Frank Sinatra classic that gave him back his voice after he had a stroke. A 15-year-old performs an original tune about growing up Black in Britain. An 83-year-old from Derry sings a song that she gave up 30 years ago because it made her daughter cry, and a father and son perform the lullaby that's always been their song.

Alison Hammond takes the pop-up stage to Edinburgh. A woman sings an Etta James number for the bus driver who left her a handwritten note and drove away, a 22-year-old performs his mum's favourite song, a former soldier sings the Zach Bryan track that helped him through PTSD, and a hospital volunteer sings A Fond Kiss by Robert Burns for a D-Day veteran on his 100th birthday.

Alison Hammond presents the show giving people the chance to perform the one song that tells their story - often in front of a crowd for the very first time. Mentors Paloma Faith and Sam Ryder watch and listen to the performances. In the first episode, Alison heads to Liverpool, where a teenager sings Bocelli for the foster mum he can't find words to thank, and a kidney transplant recipient brings Sam and Paloma sprinting out into the downpour. With only one place available at the grand final at London's Hackney Empire, Sam and Paloma face an impossible choice.