 Xia Tian, Jia Jiang, Fang Wei, and Bulu all grew up on Westside Street together and currently study in Ying Ye School, one month away from graduation.Xia Tian's dad is a police officer in Westside Street and is retiring tomorrow.But just on that day, they all had a fight at school with the Dinosaur gang, and were almost expelled by the principal.