Going through Google with the terms "Tree of Life" and "movie" I came up with a multitude of hits. The Wikipedia entry at http://en.wikipedia.org/wiki/The_Tree_of_Life_%28film%29 gives a good run-down of the plot, the actors involved, etc. You might want to check that out.
A short synopsis of the plot stated: "The impressionistic story of a Texas family in the 1950s. The film follows the life journey of the eldest son, Jack, through the innocence of childhood to his disillusioned adult years as he tries to reconcile a complicated relationship with his father (Brad Pitt). Jack (played as an adult by 'Sean Penn' ) finds himself a lost soul in the modern world, seeking answers to the origins and meaning of life while questioning the existence of faith. Written by alfiehitchie "
Spiritually the story is based in part upon the Book of Job in the Christian Bible.