The top class Lu Zhaoheng lost his memory due to a car accident three years ago. He mistakenly regarded the substitute Jiang Siye as his true love, doted on him to the bone, and held him on the altar. Until his memory came back, he tore up the contract in public and said coldly: "You are just a substitute." Jiang Siye left silently, retreating into seclusion. But when Jiang Siye returned as a new musician with a hit album, the whole network exploded - the melody of "Substitute" was actually a private demo written by Lu Zhaoheng himself to his "lover". In front of the camera, Jiang Siye had the same mole at the end of his eye as before, but he never looked back for him. Lu Zhaoheng rushed into the tour venue like crazy, only to see thousands of people in the audience shouting in unison: "Jiang Siye, we are waiting for you to come back." Only then did he realize that what he had lost was never the substitute, but the whole world.
