Xia Yingxue has an extraordinary gift for painting, using vivid colors to create a dreamlike world. Gu Xingyao is sharp-minded and is just beginning to make his mark in the business world. The two soon fall in love, stroll around campus, and dream about the future.
But their happiness doesn’t last. Harsh reality follows them everywhere. Under the strain of prolonged creative pressure and difficult living circumstances, as well as the trials set by Gu’s mother, Xia Yingxue develops severe depression. Pain and despair leave her no choice but to leave the man she loves, Gu Xingyao. For the next 1,621 days, they live worlds apart, but Gu Xingyao can never forget the time he spent with Xia Yingxue.
By chance, and after making every effort, Gu Xingyao is finally reunited with Xia Yingxue. She is still struggling in the mire of depression, and his arrival is like warm sunlight illuminating her dark world. In this long-awaited reunion, can Gu Xingyao help Xia Yingxue overcome her illness and let their love shine again? How will the two continue the sweet story they once had to leave unfinished?