Kyungsoo is a senior detective and perfect at his work. The only reason for it, he believes is that he has worked alone for all these year. Now Kyungsoo had been assigned to a case of missing dead bodies,the biggest case of his career, but he is required to work with a partner at this. The boy has freshly passed out his training and this is his first case. His new partner is a rookie, is clumsy and a total trouble. And Kyungsoo thinks it is his doom's day.