Truman Capote, a journalist, researches the murders of an entire family, the Clutters. He originally planned on writing an article on the gruesome murders. Later, he decides it will be transformed into a much larger plain: his book, In Cold Blood. The family resided in rural Kansas before two thieves entered their unlocked home and murdered all four of them for no other reason than they were mislead. "Capote" follows the author through his interviews with friends, and mostly, the two murderers, Perry Smith and Richard Hickock. Capote spent many hours with the two killers attempting to get into their heads and find out what really happened that night.
After spending so much time with him, Truman Capote (played by Phillip Seymour Hoffman) begins to develop something more than just a friendship with Smith. He begins to see what he saw and begins to feel for this lonely man on death row. His compassion leads him to attempt to help them, though this only leads to internal conflict for himself as only an execution could provide the proper closure for his book. Clifton Collins Jr. plays Perry Smith alongside Mark Pellegrino as Richard "Dick" Hickock.