A young actor's fascination with Robert De Niro's "Taxi Driver" persona leads him into a morass of strange and obsessional behaviors.A young actor's fascination with Robert De Niro's "Taxi Driver" persona leads him into a morass of strange and obsessional behaviors.A young actor's fascination with Robert De Niro's "Taxi Driver" persona leads him into a morass of strange and obsessional behaviors.