The Most Beautiful Goodbye in the World

Ordinary middle-aged woman In-Hee has a husband, a son and a daughter. One day, In-Hee learns that she has a terminal cancer. From that moment her family begins to realize how important she is to their family.
For years, In-Hee suffered from Polyuria (frequent urination) so she asked her husband, who is a doctor, to check her condition, but her husband was indifferent enough to refuse. But now, her husband regrets his past indifference and her daughter, who fell in love with a married man, realizes her mom's existance from the wife of the man who she loves. In-Hee's mother-in-law also regrets her cold behavior to In-Hee.
Since In-Hee's condition cannot be cured all her family can do is provide comfort and let her die peacefully ...