Le Coup de Foudre tells the story of two graduating high school students Yan Mo and Qiao Yi who promised each other that they would study overseas together. The promise doesn't get fulfilled and both of them end up losing contact with each other. A class reunion four years later brings Yan Mo and Qiao Yi back in contact and this time, Qiao Yi realizes she has feelings for Yan Mo. She decides to follow Yan Mo in an effort to be together with him. As fate would have it, she arrives only to learn that Yan Mo already has someone else. Yan Mo still does a lot of things secretly for Qiao Yi despite not being able to express his feelings. How will this awkward romance end?