Kim Hyun Joong is the leader of the biggest mafia ever. His four sisters formed they're own little gang and they all live together. They harbor all on the run gangs and mafias. Five undercover agents enter the house posing as a gang known as big bang. But when they're leader Gd begins to fall for one Hyun Joong's sisters, he begins to find complications with completing his job. Will he be able to keep it from her or get found out and killed?

Zelo is 18 years old when he gets into a car accident caused by a drunk driver. He looses 4 years of memories due to the head injury he suffered. He rejects the love of his life Himchan for at 14 he didn't believe he was gay. They meet when zelo was gonna commit suicide. Himchan talked him down and zelo explained his reasonings. But now himchan must win a confused zelo's heart. Will zelo remember they're life together? Will zelo accept himchan's heart or break his heart with rejection?