Arson investigator Samantha Orland calls upon the Special Crimes Unit for help with a case that's been elevated to attempted murder when a serial arsonist's most recent fire involves a family.
A shocking revelation complicates the battle between Team Arrow and Damien Darhk. Thea loses control in front of Alex.
Oliver and Thea are concerned when a family friend plans to run for mayor, Thea starts to exhibit side effects from the Lazarus Pit, and Felicity asks an employee for help with a business decision.
The increasing tension between Oliver and Diggle puts their lives into jeopardy as they continue their pursuit of villain Damien Darhk.
Laurel must deal with the consequences after taking Sara back to the hidden city of Nanda Parbat. Oliver gets a major surprise.
