Plot Summary

      The play is introduced to the audience by Tom as a memory play, based on his recollection of his mother Amanda and his sister Laura.Amanda's husband abandoned the family long ago. Although a survivor and a pragmatist, Amanda yearns for the illusions and comforts she remembers from her days as a fêted Southern belle. She yearns especially for these things for her daughter Laura, a young adult with a crippled foot and tremulous insecurity about the outside world.
         
      Tom works in a warehouse, doing his best to support them. He chafes under the banality and boredom of everyday life and spends much of his spare time watching movies in cheap cinemas at all hours of the night. Amanda is obsessed with finding a suitor for Laura, who spends most of her time with her collection of little glass animals. Tom eventually brings a nice boy named Jim home for dinner at the insistence of his mother, who hopes Jim will be the long-awaited suitor for Laura. Laura realizes that Jim is the man she loved in high school and has thought of ever since.

        After a long evening in which Jim and Laura are left alone by candlelight in the living room, waiting for electricity to be restored, Jim reveals that he is already engaged to be married, and he leaves. During their long scene together, Jim and Laura have shared a quiet dance, and he accidentally brushes against the glass menagerie, knocking the glass unicorn to the floor and breaking its horn off ("Now it's just like the other horses," Laura says). When Amanda learns that Jim was engaged she assumes Tom knew and lashes out at him: ("That's right, now that you've had us make such fools of ourselves. The effort, the preparations, all the expense! The new floor lamp, the rug, the clothes for Laura! All for what? To entertain some other girl's fiancé! Go to the movies, go! Don't think about us, a mother deserted, an unmarried sister who's crippled and has no job! Don't let anything interfere with your selfish pleasure. Just go, go, go - to the movies !") At play's end, as Tom speaks, it becomes clear that Tom left home soon afterward and never returned.

         In Tom's final speech, as he watches his mother comforting Laura long ago, he bids farewell: "Oh, Laura, Laura, I tried to leave you behind me, but I am more faithful than I intended to be! I reach for a cigarette, I cross the street, I run into the movies or a bar, I buy a drink, I speak to the nearest stranger - anything that can blow your candles out! [LAURA bends over the candles.]- for nowadays the world is lit by lightning ! Blow out your candles, Laura - and so good-bye." Laura blows the candles out as the play ends.

http://en.wikipedia.org/wiki/The_Glass_Menagerie#Plot_summary