Two best friends since childhood, Liv and Emma, have always shared the dream of having their weddings at New York's ultimate bridal destination, the Plaza Hotel, in June. Their friendship is put to the test when a clerical error causes their weddings to be booked on the same day. Neither is willing to step aside for the other, leading to a rift between them. As the wedding preparations get underway, both women escalate their tactics to ensure their day is the most remembered, turning from best friends into worst enemies. From sabotaging dress fittings to altering dance lessons and even influencing each other's bachelorette party plans, their competition knows no bounds.

Caught in the crossfire are their mutual friends and families, who are forced to take sides in the escalating conflict. The situation grows increasingly absurd, leading to public embarrassment and personal revelations. Meanwhile, the wedding planner, tasked with orchestrating both ceremonies, struggles to keep up with the demands and deceptions of the brides-to-be. As the big day approaches, both women are faced with the realization of what their unbridled ambition could cost them, prompting a reevaluation of what truly matters in life. Amidst the chaos, the enduring power of friendship and the importance of compromise come to light, but whether it's enough to salvage decades of shared dreams and memories is left to be seen.