It is about some men going to a wedding when one is stopped by an 'ancient mariner' (sailor) who makes the men stop and listen to the story of his life.
The theme is about the ingratitude of and and how he crucifies and kills the very thing God had sent for salvation. This is shown through a Mariner, who shoots the very bird that brought him the good...
Rime = poem
Ancient = old
Mariner = sailor
you could class it as that but actually ancient means old but in some way mysterious and mariner is a man who works on a ship but is always in charge of...