After his business goes bankrupt, 30 something Kyung Min (Oh Jung Se) kills his wife impulsively. Hiding his anger, he seeks out his former middle school classmate Jong Suk (Yang Ik June). Jong Suk now works as a ghostwriter for an autobiography, but he dreams of writing his own novel. For the first time in 15 years they meet. Kyung Min and Jong Suk both hide their own current situations and begin to talk about their middle school days.<br><br> At their middle school, they were classified by their wealth and grades. Kyung Min and Jong Suk were at the bottom. They were called pigs. They were bullied by a ruling class called dogs. When they were called pigs they got angry, but couldn't do anything against the dogs. Then a king of pigs appears - Chul (Kim Hye Na). Kyung Min and Jong Suk became to rely on Chul Yi.<br><br> Now, leading Jong Suk to their middle school grounds, Kyung Min discloses the shocking truth to Jong Suk of what happened 15 years ago. <br><br> (Source: Asian Media Wiki)