"Geum Jan-di (Ku Hye-seon) comes from a poor family and she got admitted into the prestigious Shinhwa High School after stopping a Shinhwa student who was being bullied from committing suicide. Shinhwa High was established by the Shinhwa Group, the biggest conglomerate in Korea, and is attended by the scions of the wealthiest families. Here she meets face-to-face with the nortorious F4 members (Flower Four Boys), the four richest and most privileged students who reign over the entire school. Gu Jun-pyo (Lee Min-ho) is the leader of Fr and is also the heir of the Shinhwa Group. He issued a dreaded 'red-card' to Jan-di and makes her life miserable after she humiliates him. The only person who seemed to have sympathy for her was Yoon Ji-hoo(Kim Hyun-jung), one of F4 who saved her numerous times. However, Jun-pyo developed a feeling towards the spunky Jan-di, the first person ever in Shinhwa to declare war against the elitist F4! It turned out to be a twisted love triangle between Jan-di, Jun-pyo and Ji-hoo."--Container.