This true story takes place onboard the Nellie in the rivers of Africa. Charlie Marlow is surrounded by his fellow crew as he tells his story from six years ago about the his travels up the Congo River. Marlow travels up the River to retrieve the Central Station manager Kurtz for the Company. Kurtz is a very successfully leader of the African tribes surrounding the Central Station; he has managed to obtain the most ivory of all the Stations combined.
Heart of Darkness is a classic novel that is well known throughout the science fiction community. The author, Joseph Conrad, captured these true events so precisely and detailed that the horror of reality will leave you on the edge of your seat.
For a more in-depth summary, read the first two or three paragraphs of my Reader Response Journals. Warning: these Journals contain spoilers.