What the box says:  The Dude.  One cool guy.  Who one day comes home to find two thugs have broken in and ruined his favorite carpet - the one that made the room "hang together".  Thing is, they did it because he's got the same name as one of the richest men in town.  Lebowski.  But, hey, no problem.  He'll get even.  At least he'll get someone to pay for the carpet.