Wan Niang, a house-filling daughter-in-law sold by the Jeju government, married into the Cheng family for three years and strictly abided by an iron rule: all bronze mirrors after Hai Shi must be confiscated. Until one night, a mirror that should not have been standing reflected the ghost of the third aunt who had drowned. The scissors were pressed against the tip of her throat, but the ghost said "help me". The husband recited the rules in the voice of his mother-in-law, and the sound of crutches outside the window approached step by step - every mirror in this century-old mansion hid an unfinished life. And San Yiniang's mouth shape told her that she was not the first, nor would she be the last.