Classics: Once Upon a Time in the West

A man arrives at a station. He doesn't talk much; he plays the harmonica. He has arranged to meet Frank. However, Frank has sent three henchmen who are up to no good. The traveller shoots the men dead. Widower Brett hopes to become rich now that a new railway line is to be built across his land. He has recently remarried and is preparing a party. However, the first guest is not invited: it is Frank, with his gang.