Jang Wooyoung, Park Jung-su(Leeteuk), Lee Jinki(Onew) and Kim Taeyeon. The four best FBI officers in the Bureau. But what happens when one is forced to commit the ultimate betrayel, all to protect the one person he cares for more than anyone else? Based roughly on TVXQ's Before You Go. Pairings are Wootae/Taeteuk and Onyeon