On a rainy night after a breakup, stains remained on the window edge for three years. She guarded the old house and the old illness, hiding her deep feelings between the pages of ancient books. After seeing each other again after a long separation, investment banking elite Shen Yizhen remains cold and aloof, but there are hidden difficulties in his eyes that he dare not express. Bearing the burden of huge debts and serious illness of his family, he cruelly pushed away his beloved, but silently stayed by her side. Two-way love cannot withstand the shackles of reality. We know that we care about each other, but we can only reluctantly let go. The rain on the window edge will eventually stop, but the regret will linger for the rest of our lives. After all, we cannot love each other, and we are far apart.