A depressed Tom sits on the railroad tracks, bent on suicide. Watching from a bridge above the tracks overhead, Jerry laments his old friend’s state. Jerry knows that when he gets home, his own friends will ask him why he didn’t even try to stop Tom. Jerry believes that “it’s better this way, and for the first time since he met her, he will be happy”. Jerry recalls the events leading up to Tom’s depression:
Tom and Jerry are inseparable friends, until a beautiful white female cat catches Tom’s eye. The white cat initially reciprocates Tom’s affections, but that soon changes for the worst: the much-wealthier Mr. Butch lives next door to the white cat and he also becomes smitten by her. He rudely interrupts her relationship with Tom to make his move and ignores Tom’s attempts to stop him. Attracted by Butch’s wealth, the white cat proves herself to be an opportunist as Jerry always suspected her to be and leaves Tom.
Jerry breaks from the sad story to think about his own girlfriend, “Toots”. He is happy that, unlike Tom’s ex-girlfriend, she has been faithful. Suddenly, Jerry’s love world is shattered when Toots rides by with another mouse (who looks like an adult Tuffy), a “Just Married” sign on the back of their car. Jerry, now dejected, joins Tom on the railroad tracks. They sit and wait for an oncoming train, which draws near to run over them. The oncoming train’s whistle sounds louder as the cartoon fades out.
Source : WikiPedia