When groom invites his ex to the wedding, the ex and her partner, who are currently having relationship issues, attend to congratulate the bride and groom. However, complications arise when old flames reignite just before the wedding day.

When Grace receives an unexpected invitation to Jay's wedding, her ex she still loves, tensions rise and emotions run high. Will the wedding turns into a chaotic mess, and whose hand will Jay take in marriage? Join the rollercoaster of laughter and tears in "My Ex's Wedding."—pavayut

This movie is about love. When the groom invites his ex-girlfriend to the wedding, the ex and her new partner, who are currently having relationship issues, attend to congratulate the bride and groom. However, complications arise when old flames reignite just before the wedding day. Will the wedding proceed? Who will end up with whom? How will this tangled love story, filled with hesitations and past relationships, conclude?