Blair is a mistress.  She decided to become a mistress when she realized how poor job prospects are for theatre majors.  In time, she falls in love with a client.  It becomes impossible for her to have meaningless sex, regardless of her acting capability.  It all comes to an end when Blair is caught in bed by a furious wife.  In an odd turn of events, Blair and the jilted wife go into business with each other.  Ultimately, she realizes love is all that matters.