Robert Downey jr. plays Danny Dark, a writer of pulp fiction novel called "The Singing Detective." He is hospitalized with a skin disorder which apparently is psychological. His shrink is played by Mel Gibson, in an unorthodox role for him. Dark's novel is based on events in his childhood, making characters from people he had met. Danny is delusional and imagines things in the present, confounding the people in real life with the characters in his book. The dialogue in the movie is excellent. If you enjoyed the dark humor of the Joker in the Dark Knight, you will enjoy the ramblings of Downey early on. The real problem with the movie is that you realize that all the action in the film is delusional. As far as real action and plot, the film moves along as a one man play. Bad language, simulated sex, no nudity.