Tae-sik, a carp-human who is active online as 'black-bean' is attacked by another character called the 'Johnson' in the same community. A video of himself being beaten up is spread online in no time... Tae-sik plans to take revenge on Johnson. He starts learning how to fight with his friend Hee-joon and meets a girl named Yeong-ja. Tae-sik lives life without a clear target and Yeong-ja relieves her stress by eating while Hee-joon wants to fill up his hollow self. These three get together like a volcano.