Overview: MA CHONG, MA KEUNG and MA YAU discuss the matter at YIN-FUN’s place while eating instant noodles together. MA YAU wants to steal their letters from the Time Capsule before the gathering. The three of them and YIN-FUN go to the hill at the back of their schools in the middle of the night. The hill is now fully covered with trees after the implementation of “Campus Tree Planting Program”. YIN-FUN finally returns home with mud stains and wounds on his face and all over his body. The Time Capsule he is taking back has become a ball unexpectedly. During the emeritus sharing session of Principal SO, MA FU is invited to read the letters in the Time Capsule. The letter he is reading was actually written by MA KIN. MA YAU questions Principal SO and Principal SO tells her the truth. MA KIN mentioned in his letter that everybody had misunderstood MA FU. CHI-YAN and CHI-LEI are curious to know what he is actually talking about……