12 handsomes young man with different background and different stories . They have became bestfriends since high school . They trust each other more than other people . They were like a big family since their parents were long gone . Their brotherhood was strong enough even a sharp sword cannot break the bond . But , one thing happen that make their trustworthy slowly broken . What had happened ? How that thing happened ? And most importantly , who was the person that betray their brotherhood ?

"Hyung ! Run !"

"No ! Sehun-ah !"

"Hyung... just....run"

"No ! Sehun no !!"

"Xiumin , hurry up ! He might catch us now !"