I attend my amnesiac girlfriend's engagement party, only to discover that I'm not the groom. But just one second before the rings are exchanged, she suddenly tears off her veil, points at me in the corner, and shouts, "I want to leave with him!" The entire room erupts in shock, and I freeze, thinking she has finally remembered everything. But when she approaches me, she coldly hands me an agreement and says, "Sign this. Be my decoy." A year ago, she underwent a memory-sealing procedure to save her father, erasing every memory of me.