A Brief Moment of Peace tells the story of Chen Yishi and Lu Ning, and their turbulent, heartbreaking romance in their youth. After graduating from high school, Lu Ning starts university as a computer science major. Their first campus election puts her at odds with Chen Yishi, and his furious reaction marks the beginning of their ill-fated relationship. Later, Lu Ning befriends Chen Ya, and life seems to grow a little warmer. But Chen Yishi keeps picking on her: he scares off the kitten she was playing with, then, after being elected class monitor, reports her without mercy for not doing her homework, forcing Lu Ning to run laps on the track under the scorching sun. Lu Ning grew up in a broken family, and the trauma of her childhood has left her sensitive and fragile. The hurt she feels after running and the tears she sheds late at night conceal pain no one else knows about. When Chen Yishi sees how vulnerable she is, he quietly feels remorse and tries to make amends. During military training, Lu Ning, afraid of embarrassing herself, gets caught slacking off and faces an 8,000-character punishment. Their relationship tightens like a taut string through these events. As people around them voice all kinds of opinions, things grow increasingly complicated that autumn. Can they break the deadlock and find a brief moment of peace within themselves?