Emiko goes hunting for the man who killed her mother, and gets a new partner. Meanwhile, Oliver learns about the half-sister he never knew he had, and Diggle makes Diaz a deal in return for Dante's whereabouts.

Oliver gives a documentary team access to him and his family as part of his new transparency, and they probe into every corner of his life--and the lives of other vigilantes in Star City--as a vigilante mask-killer shows up.