Grace blames her relationship with Will as the reason for her lack of interest in dating and decides they can no longer have fun together. Meanwhile, Jack enlists Will's help when the IRS catches up with him.

When Rob and Ellen ask Will and Grace to be the best man and maid of honor at their wedding, Grace's sexy past with the groom is exposed when Ellen learns at her bachelorette party that Grace once slept with Rob. Meanwhile, Jack is confused by his reaction to the entertainment at Rob's bachelor party.

On Christmas Eve, Grace is torn when she has only two tickets to ""The Nutcracker"" and can't take both her best friend Will and new husband Leo, but her back-and-forth indecision leaves Will spinning like a Hanukkah dreidel between a dithering Grace and his previous holiday plans with Jack and Karen.