With his power at unimaginable levels, Darhk sets out to regain control of Rubicon.
Facing the threat of nuclear fallout, Felicity decides to reach out to an untrustworthy ally.
While Oliver starts his journey back, Team Arrow is fighting to keep their heads above water in the Glades. Their fight against Brick turns up information that brings Malcolm Merlyn directly into the fight.
The remnant of Team Arrow continues to struggle to find their identities without Oliver while Brick is laying siege to the city and Merlyn tries to flee the city.
After Oliver's defeat at the hands of Ra's al Ghul, his comrades are left to pick up the pieces and try to carry on their work.