Mary Fiore(Jennifer Lopez) is the wedding planner. She's ambitious, hard-working, extremely organized, and she knows exactly what to do and say to make any wedding a spectacular event. Bt when Mary falls for a handsome doctor Steve Edison(Matthew McConaughey) her busy yet uncomplicated life is turned upside down - he's the groom in the biggest wedding of her career! Will she help him walk down the aisle with his internet tycoon girlfriend, or will Mary finally get to be the bride herself? When it comes to love, you can never plan what's going to happen.