At the end of the alley, a "lighting store" has its lights on all year round. The mysterious boss (played by Liu Yijun) carefully wipes every light bulb, and customers of all kinds come in an endless stream. Nurse Xu Nian (played by Zhang Ruonan) and her boyfriend Zheng Man (played by Bai Yufan) have just moved into an apartment near the store. She gradually discovered that everyone here has an unspeakable secret in their hearts. On a stormy night, she walked into the lighting store at the end of the alley, and the answer was gradually revealed... The film is adapted from Jiang Cao's comic of the same name "Lighting Store".