Liang Weisheng and Su Mo have known each other since junior high school. They have a crush on each other, but neither of them has the chance to say the words first: "I like you." Fate is like a thread, intertwined and entangled, with hesitation, sadness, loss and misunderstanding at both ends of the thread. Many years later, the two reunited again. Wei Sheng already had a girlfriend, and Su Mo was engaged. Should the two let go of their hidden feelings and start living their own lives, or should they choose to bravely express their love for each other?