Before throwing himself from the window of his attic, the untitled protagonist writes some notes related to his mental state. Then, he begins to recall an old story that happened in the years of the First World War: suddenly, he finds himself a prisoner of a German ship in the Pacific Ocean. After only five days, the protagonist manages to escape with a raft. Wandering for days, adrift in the sea, one afternoon he finds himself stranded on a disquieting and apparently deserted island and, from there, things only get stranger...

"Dagon" is the second story of the writer H.P.Lovecraft, written in 1917 and published, for the first time, in 1919.