SUM finds WING taking part in stealing mail with other students and tries to stop them but they run away. The students, used by TURBO, a gang leader, play the trick of luring the principal away by putting the mail into ON’S school bag. As TURBO have students as his targets, his influence gains momentum in schools. HEY and CHI look for an ideal shop. TI envies they are great couple. CHI accidentally hears KIU mentioning TI’S secret admiration of HEY. TURBO shops with credit cards stolen by WING and his gang. When the SQUAD knows what TURBO does, it dogs and arrests WING, who shields TURBO and admits all the wrongdoing himself. WING’S grandma asks SUM for help and WING takes TURBO’S advice of pretending to be good. But the principal insists WING to quit from school.