Kim Myungsoo is a cold-hearted 20 year old who's a gang member in one of the most strongest gangs there is in Seoul called 'INFINITE'.  He's extremely blunt and he doesn't seem to care about anything. Until one day, when 'INFINITE" got into a fight with another gang, Myungsoo had no other choice but to hide at a nearby cafe. There he met a strange boy around his age who has a very chodding personality named Lee Sungyeol. He was quite interesting, so Myungsoo decided to come visit often. Soon enough, Myungsoo clamied the chodding his 'Coffee Prince'. The 'Coffee Prince' would always back up Myungsoo whenever he needed help, always talk to him when he was upset, and of course, treat all his wounds and give him some fresh, hot coffee♥.

But will Myungsoo's gang effect Sungyeol's personal life and his dream job at the cafe?