"Someone who glows so brightly is not going to grow old," Fellini prophesied about Irene Staub, aka Lady Shiva, one of the all-time greatest Swiss divas. Though Irene had a vibrant career as a model and singer in an underground Zürich band between 1968 and the late 80s, she died far too young. Through archival footage and interviews with prominent figures, director Gabriel Baur tells her story.