Elementary school brothers Shan and Jia embark on a simple mission that only a child could appreciate the severity of in this freewheeling, carefree school yard tale. Because Pei-Lin, Shan's crush, is going to move away soon, they make a promise of exchanging their favourite signed baseballs. Meanwhile, Jia has lost his brother's signed ball, leading the pair of them to a nearby park to begin the operation of finding it before they are due back at school around sunset.
