Tzuyu is a 16-year-old girl in Tawain who gets bullied for not having parents and for being adopted. She dreams about this woman in a red dress with long black hair every night. Little does she know the woman is real and is just on the other side. Mina is an 18-year-old girl in American who appears often in Tzuyus dreams. She doesn't know why she does but she feels like it's her destiny to find the girl and save her.