"Somehow, Eun Soo Hyun gets involved with other people who suffer from pain similar to hers and solves their mysterious…
Its not that he is not suffering.it just that the mother feels it was her fault that her son died because she was careless and didn't ensure that their gate was closed properly. But I think its the fathers fault because he had a mistress who left after his wife arrived and didn't close the gate and I think mother had closed the gate properly. And I have a feeling that the mistress is her own sister. Because she was supposed to attend wedding but she came back and surprised her mom in the same clothes, after her sister came back without any heads-up she had to return.