Lin Wan, a sign language translator, cannot perceive emotions due to the shadow of his childhood, so he can only "act" as a normal person by studying micro-expressions. While serving the deaf entrepreneur Jiang Jin (who temporarily lost his hearing due to an accident), she was attracted by the "empty feeling" in his eyes that was the same as hers. Jiang Jin's world became sharper due to the silence, but he could not understand Lin Wan - her smile was as standard as a textbook, and her emotions never reached her eyes. The two began a careful mutual trial and redemption in a silent world, only to discover that their meeting was far from a coincidence.
