When a younger lady meets a violent dying after partying at Verdant, Detective Lance and his new accomplice, Detective Hilton inform Oliver and Tommy that she was on the drug Vertigo. Oliver instantly pays a go to to the psychological establishment the place The Rely is locked up, however finds he's in no situation to deal medication. Nevertheless, when The Depend escapes and Starling Metropolis is flooded with much more Vertigo-related violence, Oliver and Diggle make it their mission to trace him down. After Detective Lance uncovers incriminating proof in opposition to him, Tommy goes to nice lengths to clear his identify, and the fallout from his actions leads Tommy down a brand new, surprising path. In a flashback to the island, Oliver remembers the teachings he discovered from Slade and Shado.