Su Wan, an art teacher who has been married for three years, leads a stable and perfect married life in the eyes of outsiders - her husband Chen Mo is mature and stable, has a successful career, and manages his life in an orderly manner. However, only she knows that this seemingly perfect relationship has long since lost its heartbeat, and only the habit of treating each other as a guest remains. Her world is like a silent lake, until the appearance of the student Lin Ye, a stone is thrown to break the tranquility.
The freshness and straightforwardness of the forest and the unabashed enthusiasm in his eyes were like the evening wind in midsummer, which stirred Su Wan's silent heartstrings. His appearance plunged her into an unprecedented panic, but she couldn't help but be attracted by the long-lost throbbing. Confessions on rainy nights, maintenance in open classes, out-of-control kisses in the studio... The two are repeatedly pulled between the moral boundaries and inner desires, and every time they get closer is accompanied by a deeper struggle.
