The growing tension between Oliver and Diggle puts both their lives at risk when they go after Damien Darhk and a H.I.V.E. deployed meta-human. Meanwhile, Laurel talks Thea into returning to Nanda Parbat to ask her father to put Sara into the Lazarus Pit. However, Laurel is surprised when Nyssa refuses to do it.
Brian learns a shocking secret about Rebecca’s late father but worries that telling her will land him in legal trouble. Also, Brian accidentally meddles in Rebecca’s personal life while learning self-defense from her secret boyfriend, FBI Agent Casey Rooks.
Having reluctantly agreed to share information with Rosalind Price and the ATCU, Coulson and the team go in search for the Inhuman who is killing off other Inhumans, and May feels that Hunter’s mission to take down Ward is getting too personal.
When Barry and the team find out Captain Cold has been kidnapped, they form an uneasy alliance with his sister, Lisa. However, Barry feels double-crossed when he finds out Snart is working with his father, Lewis Snart on a heist. Meanwhile, Joe is faced with a difficult decision.
When a priceless work of art is stolen and its transporter murdered, Castle and Beckett must work with the key witness to track down the painting and sniff out the killer.
Alicia and Lucca work together on a complicated case involving a designer drug dealer. Meanwhile, Eli persuades Alicia and Veronica to participate in a mother-daughter cooking show to help Peter’s campaign, but things don’t go as planned.
Noah and Quentin take on Renautas. Miko’s plan to retrieve her sword may land her in trouble. Malina’s journey bring her closer to the truth. Luke returns home to confront his past. The authorities close in on Tommy. Carlos may have found an unexpected ally and Erica solidifies her plans.
Phil convinces Lily to help with hatch the ducks he made a habitat for; Claire wants to impress her father with some ideas she has for the business; Cam spends time bonding with the frat guys.
When an old family friend, Jessica Danforth, tells Oliver and Thea that she is going to run for mayor, both Queens are concerned considering the last three mayors have been murdered. Despite their protests, Jessica makes her announcement so the Green Arrow and Speedy vow to protect her. Meanwhile, Thea begins to exhibit effects from the Lazarus Pit. In addition, Felicity is faced with a tough business decision and looks to one of her employees, Curtis Holt, for help.
