Three months after new semester starts, but this boy marching band, the band that owned a world champion, still cannot find new members. More than half of the band graduated last semester and new generation of students like to play guitar, keyboard and drum rather than music instruments in the marching band.

A middle-class couple are separating and the three kids are to stay with their bossy and resentful mother. Missing their beloved father, the kids run away to look for him – unaware that the baby's carry-cot contains a bag of pure heroin hidden by a street-kid during a police raid.