"Now... I'm going to divorce you." In-woo, who returned to Korea from England after six years, was greeted by his young wife's notice of divorce. If that was what his wife wanted... In-woo writes the divorce papers as calmly as he did when he wrote the marriage papers. The last month they can spend together as a couple. He thought they would each organize their feelings that had piled up in their respective places as much as they had wished for so long... "I promised before my father passed away that I would definitely be a helpful person to my brother." She, Song Hae-in, is unnecessarily desperate, saying that she will do her best for the remaining time and that she will definitely repay the gratitude she has received so far. "You are also at fault to this extent." The two of them are meeting each other for the first time after a long time. Will their true feelings completely connect?