Sean Anderson partners with his mom's boyfriend on a mission to find his grandfather, who is thought to be missing on a mythical island.

A New York writer on sex and love is finally getting married to her Mr. Big. But her three best girlfriends must console her after one of them inadvertently leads Mr. Big to jilt her.

Carrie, Charlotte, and Miranda are all married now, but they're still up for a little fun in the sun. When Samantha gets the chance to visit one of the most extravagant vacation destinations on the planet and offers to bring them all along, they surmise that a women-only retreat may be the perfect excuse to eschew their responsibilities and remember what life was like before they decided to settle down.