Oliver Queen struggles to balance his life as the Green Arrow with his new role as mayor of Star City. He and Felicity Smoak try to build a peaceful life together, but threats from the past and present make it difficult. A new villain, Damien Darhk, emerges with a dark agenda and a mysterious organization called H.I.V.E. Darhk’s supernatural abilities and ruthless tactics push Oliver to his limits.
The team faces internal conflicts as Laurel Lance resurrects her sister Sara using the Lazarus Pit, which has unforeseen consequences. John Diggle deals with personal turmoil when his brother Andy’s betrayal comes to light. Thea Queen battles the bloodlust caused by her own resurrection, straining her relationship with Oliver.
Felicity takes on a larger role in the team but suffers a devastating attack that leaves her paralyzed. Her strength and resilience inspire those around her. Meanwhile, flashbacks reveal Oliver’s time in Lian Yu with Conklin and Taiana, uncovering more secrets about his past.
As Darhk’s plan to destroy Star City unfolds, Oliver must rally his allies, including returning friends like Malcolm Merlyn and Nyssa al Ghul. The season culminates in a brutal battle, with sacrifices made to save the city. Felicity and Oliver face heartbreak, but hope remains as they look toward an uncertain future. The season ends with a shocking cliffhanger that sets the stage for new challenges.