Gyeong-ah works as a caregiver and lives alone. The only one she can rely on is her daughter, Yeon-su, but it's hard to see her after she moved out on her own. Meanwhile, Yeon-su, who is suffering from her ex-boyfriend, Sang-hyun, argues with him again and visits her mother’s house. After Yeon-su left, Gyeong-ah receives a shocking message from a stranger.。婚礼上消失的新娘去了哪里?一个神秘人物的出现让三年前逃婚真相浮出了水面……她究竟是个怎样的女人?当年的幕后黑手又是谁?谜底层层解开,真相步步逼近!。