This portrait of Argentinian composer Astor Piazzolla - pioneer of the 'new tango' - looks at his turbulent and complicated personal and professional life through candid interviews with the man himself as well as family, friends and the musicians who performed with him. It also includes tributes from contemporary musicians who have been drawn to his music, including Daniel Barneboim, Yo-Yo Ma, Gary Burton, Joanna MacGregor, James Crabb and Richard Galliano, interspersed with sequences from Fernando Solanas's films 'El Exilio de Gardel' and 'Sur', for which Piazzolla wrote the music.