predictable, but unfortunate. i'm having trouble coming up with scenarios where this will work out for the protagonists. there's that phone that Ahn Dong Chil collected, but that could only at most affect Jeong Woo.
Remember that there's still the room full of safe/boxes. Jong Woo said that if those documents were ever to get out, everyone (the whole organization, corruption, all the bad guys basically) would be in huge trouble and no one nor nothing could save them.
Of course, you must have watched the ending already. I still haven't. I hope they use those documents or else, I'm going to be VERY disappointed with this drama. :/