The male protagonist Jiang Yihan has loved painting since he was a child. When he was young, he made an agreement with Meng Xinran to pursue their artistic ideal together. The two have been together for many years, and their love is hidden. After the college entrance examination, Meng Xinran was diagnosed with a chronic disease that was difficult to cure. She knew that she would be a drag, but she was unwilling to crush Jiang Yihan's dream of being a painter, so she suppressed her love and said hurtful words and took the initiative to break up.
The sudden separation and the heart-wrenching confession caused Jiang Yihan to fall into severe depression. For a whole year, only painting supported him through the dark days. He always believed that Meng Xinran had completely abandoned their agreement, and hatred and longing were intertwined in his heart.
The following year, Jiang Yihan met Qin Zhixia, a freshman at the same school, on the high-speed train. Qin Zhixia is a wealthy daughter who was ignored by her family. She was also deeply depressed when she was young. She understands the depression of being alone and the broken heart. She has a lively and warm personality. She takes the initiative to get close to the silent and gloomy Jiang Yihan, and heals the scars in his heart little by little. Both of them love painting, and their souls are on the same wavelength. They become each other's salvation, and their love quietly grows.
After entering the school, Jiang Yihan accidentally discovered that Meng Xinran, a powerful singer who is now popular all over the Internet, was the one who abandoned him back then. When he saw Meng Xin Ran's glamorous celebrity status, he mistakenly thought that she had long since abandoned her original intention of painting and was filled with disappointment and alienation.
In the middle of the story, the three people continue to intersect, and past misunderstandings emerge layer by layer. Jiang Yihan slowly gets out of his knot with Qin Zhixia's company. In the later period, Meng Xinran's condition deteriorated rapidly. Before her death, she left behind a private painting gallery. The gallery was filled with oil paintings that she had created alone for many years. Each one recorded the agreement between her and Jiang Yihan when they were young, and came with letters that revealed all the reasons for their cruel breakup.
In the end, Jiang Yihan completely let go of his many years of obsession and faced up to his feelings for Qin Zhixia. The two joined hands to adhere to their ideal of painting, and headed for a future that belonged to each other with two regrets and tenderness.
Purpose: Young people heal each other in pain, let go of regrets, accept all the suffering and tenderness of the past, face regrets and partings, and pursue their own love and life.