Return to Sender

Several months after Visceral's demise, Team Arrow finds themselves on the trail of a mysterious organization operating solely in the shadows. While trying to fight a losing war, Oliver and his team are about to receive a visit from an old enemy with a promise to keep.
(Arrow fanfic with a lot of Olicity stuff, mystery, familiar faces, drama, action, and good ol' fashion vengeance. Part 2-3)