The legend of a Thunder Team secretly protecting Woolim High was never public acknowledged but nonetheless spread wildly among the student body. For some reason, the team had disappeared and evil began to rack havoc in the school. The last remaining member of the Thunder Team, Teacher Yuri , decided to recruit the badest of all bad students, 007, 187, 747 , Yeol , Hoya and Lucifer, to form a new generation of Thunder Team who would solve the crimes and restore the school back to its former

16 year old Ji Hye’s family isn’t well-to-do , when his father , who was drunk , accidentally crashed into the house of the richest’s man in KOREA, her father is required to pay the damage . Being not well-to-do, JiHye is put into a very difficult position, having his father work as a housekeeper/maid in the son’s of the richest man in KOREA isn’t really a good decision . Seeing his father so tired , Ji Hye decides to replace him

Chaemin and her sister were total opposites , Chaemin is smart but her sister is not , Chaemin isn’t popular but her sister is. When 5 boys transferred in , they asked for tutor , 3 went to Chaemin’s sister ,  only 1 went to Chaemin the other just followed the 1 who went to Chaemin. The 5 boys immediately became Kingkas of the school together with the other 6 Kingkas . Chaemin accidentally bumps into the some of the kingkas and breaks th