In spite of the mayhem that has been taking place in Ikebukuro, Shinra Kishitani and Celty Sturluson have decided to go on a short trip. Excited to finally be going out with the one he loves, the underground doctor makes it his priority to give Celty his undivided attention, even if it means rejecting phone calls from his good friend Izaya Orihara. However, despite his hopes of having a peaceful holiday, Ikebukuro's various residents continue trying to reach him. Furthermore, just as Shinra begins to enjoy reminiscing about old memories on a carriage ride together with his beloved, Celty starts to notice a strange presence...

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. 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. Now, leading Jong-Suk to their middle school grounds, Kyung-Min discloses the shocking truth to Jong-Suk of what happened 15 years ago.

Follows the musical careers and personal lives of several bands under the "Dynamic Chord" agency and music label.