Oliver is worried when a mysterious sickness sweeps town, infecting lots of of individuals, together with Diggle. Oliver discovers Vertigo in Diggle's blood and realizes The Depend has damaged out of jail and is as soon as once more distributing his drug. In the meantime, Moira goes on trial for her participation within the Endeavor. ADA Adam Donner collapses in courtroom with Vertigo signs so Laurel should step in and check out the case towards Moira. Oliver is torn between standing by his household through the trial and catching The Depend. Nonetheless, issues change when Felicity follows a lead and walks straight right into a entice set by The Depend.