As Liam Gallagher prepares to perform on the Pyramid Stage at Glastonbury, this documentary looks back at the singer's tempestuous relationship with his brother Noel, from their time together in Oasis to their more recent solo careers. With contributions from Alan McGee and Tim Abbott from Creation Records and Shaun Ryder, the film attempts to uncover why the siblings' rivalry is so intense and ponders the biggest question of all - what would it take for them to re-form?