小区里美丽的女业主常常对着电梯摄像头说话，这让新来的保安小乐感到好奇。女孩常在院里遛狗，站岗的小乐也与她成为了“每日一⻅”的朋友。女孩的男友出轨，小乐意外的成为最先知道的人，当女孩的大狗遇到危险，小乐做了人生中最英勇的决定。 Condominium security guard Xiaole is fascinated by a mysterious woman, who always talks to the CCTV camera in the building’s elevator. A friendship soon establishes as they see each other every day while the woman walks her dog. Unwittingly learned that the woman’s boyfriend cheats her with another girl, Xiaole keeps the secret to himself. Before long, the city issues a ban against large dogs in residential buildings. When the government tries to catch and evict the woman’s dog, Xiaole makes the hardest yet bravest decision in his life.