What happens if you got stranded in an unknown island?   The boys:Leeteuk, Donghae, Siwon, Hangeng, Kibum, Sungmin, planned to have a summer getaway with the girls: Taeyeon, Jessica, Tiffany, Yuri, Yoona, and Sunny. Their outing was supposed to be fun and enjoyable. But how did they end up getting trapped in