Towards the end of the Korean War an uneasy ceasefire is ordered, but out on the Eastern front line of the Aerok Hills fierce fighting continues. A race to capture a strategic point to determine a new border between the two Koreas is the ultimate prize. A bullet is then found in the body of dead company commander of the South Korean army. The bullet that killed the company commander belongs to the South Korean army. Lieutenant of the Defense Security Command Kang Eun-Pyo is ordered to go out into the Eastern front line and investigate the murder. When Kang Eun-Pyo arrives in the Aerok Hills he is surprised to find his old friend Kim Soo-Hyeok commanding troops in the Aerok Hills. Kang Eun-Pyo believed Kim Soo-Hyeok was dead. In their younger years, Kim Soo-Hyeok was a meek student, but he eventually became the leader of Aerok company as a lieutenant. The situation in the Aerok company raises many flags in the eyes of Kang Eun-Pyo...

New high-school transfer student Na-Mi comes from a small town in Jeolla Province to her new school in the capital city of Seoul. When she is nervous, her small town dialect comes out & she starts to shake. On her first day at her new school she is bullied by others. Coming to her help is a group of girls. The girls are Choon-Hwa - known for her strong sense of loyalty & excellent fighting skills, heavyset Jang-Mi - who badly wishes to have plastic surgery to get double eye-lids, Jin-Hee - excellent when it comes to spewing profanity, Geum-Ok - interested in literature, Bok-Hee - dreams of one day becoming Ms. Korea and Su-Ji - always arrogant. Na-Mi quickly becomes part of their group. When the group confronts rival girls known as Sonyeo Sidae ("Girls Generation"), Na-Mi spews curse words she picked up from her grandmother. Because of Na-Mi the girls are able to avoid a crisis. These seven girls then form their own group named "Sunny". They also vow to stay together forever. The ...