Question: is all is lost movie a true story

Answer: No, All Is Lost was written and directed by J.C. Chandor, his second feature film, following 2011's Margin Call. During his time commuting from Providence, Rhode Island to New York City, Chandor developed the idea for All Is Lost. After meeting Robert Redford at the 2011 Sundance Film Festival where Margin Call premiered, Chandor asked the veteran actor to be in the film. On February 9, 2012, Redford's casting was confirmed for All Is Lost as its only cast member. In addition to there being only one actor in the film, Redford also stated that the film has no dialogue, although there are a few spoken lines. For these reasons, the shooting script was only 31 pages long.