Still in prison, Oliver faces his biggest challenge yet. Meanwhile, Felicity gets an intriguing offer, and Diggle asks Curtis to go undercover for ARGUS.

Slabside becomes even more dangerous after a guard is murdered and everyone is a suspect. Felicity enlists help from a surprising source in her pursuit of Diaz, and Laurel flexes her muscles as the District Attorney.

Team Arrow attempts to work with the Star City Police Department but much to Oliver’s frustration, things don’t go as planned. Meanwhile, Dinah gets some life-changing news.