An alleyway has a peculiar "lighting store" always illuminated. Nurse Xu Nian and her boyfriend move nearby. One stormy night, Xu Nian enters the store, unraveling the enigmatic truth behind its existence.

At the end of the deep alley, a "lighting store" has lights on all year round. The mysterious owner carefully wipes every bulb, and there is an endless stream of customers of all kinds. Nurse Xu Nian and her boyfriend have newly moved into an apartment near the store. She gradually discovers that everyone here has an unspeakable secret in their hearts. On a stormy night, she walked into a lighting store at the end of the alley, and the answer was gradually revealed.