Jim Garrison - a New Orleans's District Attorney - just can't believe the Warren Commission official conclusion on the death of President Kennedy is accurate. Determined to prove them wrong, Garrison stakes everything to find the truth. He encounters a high-level Pentagon official who confirms to him that there was a conspiracy, but Garrison's over-the-top antics interfere with his credibility, leaving him open for ridicule. However, as more and more proof comes to light of a possible conspiracy and cover-up, the more people take note. Garrison never quite achieves his goal of learning the truth, but his investigation gives the world many things to ponder.