The documentary follows the main stages of Janis Joplin`s life, from her performance at Monterey Pop in 1967 to Woodstock in 1969 and Festival Express in 1970, including interviews with relatives, friends and rock stars of her time. The soundtrack features Janis Joplin`s hits, among which Cry Baby, Mercedes Benz and Piece of My Heart. Amy Berg shows the woman behind the myth, other than the rock&roll icon, unveils a gentle, innocent yet strong woman. Well known as rock icon, the personal story of Janis Joplin is very complex. Janis serves as a narrator, telling us her life through the letters she wrote to her friends, relatives and lovers, leading us in a journey that starts from her childhood.