Jian Dan, a nineteen-year-old hotel receptionist, has a pure heart and is full of longing for life and love. Yu Yefan, a thirty-six-year-old middle-aged married man, was impressed by Jian Dan's youth and innocence, and launched a pursuit offensive with great skill and without leaving any trace. Jian Dan was fascinated by the mature charm of Yu Yefan, a middle-aged man, and couldn't help but fall in love. Under the stern advice of her friends, Jian Dan decided to end this shady relationship. Yu Yefan asked Jian Dan to take advantage of his wife Sun Limin's business trip to stay at home again for one night as a commemoration of the breakup. Seeing that a story that shouldn't have happened is about to come to an end, Sun Limin, who has been aware of it for a long time but has always stood still, suddenly returns in the middle of the night to catch the rapist in bed. Unexpectedly, the door of the room is locked by the thoughtful Yu Yefan from inside. In a rage, Sun Limin made a scene and disturbed the neighbors. Amidst the noise of people outside and the sound of hammers hammering on the door lock, Jian Dan, who was confused and frightened, opened the window and stepped out into the night sky filled with snowflakes...