The bride is Jewish. The groom is Catholic. Her mother is a force of nature. His mother is a tempest in a cocktail shaker. And, when the bride's ex-boyfriend crashes the party, the perfect wedding starts to unravel faster than you can whistle "Here Comes the Bride!"  It's up to the sister of the bride to turn a tangled mess into happily ever after in this musical comedy for anyone who ever had parents.