Picking up right where Season 3, Episode 9 "Closure" left off, Ward marches Fitz and a Hydra entourage through the barren landscape of Maveth. Fitz tries to escape, but his new field skills are still no match for Ward’s.
Back on Zephyr One, Mack and the S.H.I.E.L.D. team regroup. The plan is simple: Mack, Bobbi, and Hunter retake the portal while Daisy, May, Joey, and Lincoln neutralize Hydra’s ground troops outside the castle. Inside the Hydra encampment, Simmons realizes that Hydra has no intent on bringing back Fitz. Malick assures her that Death is the only thing returning through that portal…
Back on Maveth, Fitz brings Ward to the only person who can guide them through the unforgiving Maveth terrain…Will! Meanwhile, Coulson, knocked out from his tumble, sees Rosalind in a dream. He wakes up alone on Maveth. He sets out to find Fitz and exact revenge on Ward.
Will explains that he was wounded by It while helping Simmons escape. Ward is intrigued. Will agrees to help Ward because Fitz has a plan to escape Hydra and leave Maveth.
Daisy, Joey, Lincoln, and May storm the Hydra encampment. Lincoln shuts off the power, thus enabling Simmons to escape. As she escapes the encampment, she notices that Hydra brought modules of the trapped Inhumans. To her surprise, she finds Andrew. He pleads with Simmons to set him free and allow him to protect her. She refuses until she finds herself surrounded by Hydra soldiers. Left with no choice, she frees Andrew. He transforms into Lash and kills the Hydra troops, while Simmons escapes. Meanwhile, Mack, Bobbi, and Hunter storm the castle and secure the portal.
Will leads Fitz, Ward, and the Hydra troops through the place Will warned Simmons to never go -- the “No-Fly Zone." A sandstorm hits them, but curiously, Will is unaffected. Using the sandstorm as a distraction, Will kills the Hydra troops and takes off with Fitz in the direction of the portal. Moments later, Coulson arrives, shooting and wounding Ward. Coulson demands that Ward lead the way to the portal.
Outside the castle, Daisy and company battle the telekinetic Giyera and Hydra troops. May finds Simmons, who tells her that Andrew/Lash is here.
May goes in search of Andrew but only finds a trail of Inhuman and Hydra dead bodies. Simmons warns the team that Ward is trying to bring It back through the portal. Mack makes a decision. If the creature returns, Zephyr One will open fire and destroy the castle. Mack and Daisy agree to stay behind and wait for Coulson and Fitz until the last possible moment.
On Maveth, Fitz realizes that Will has been possessed by It. Fitz fights Will/It to the death! Coulson sees Fitz in peril and shoots Will, knocking him off his feet. Ward takes advantage and attacks Coulson. Fitz uses a flare gun to set Will ablaze before he can crawl to the portal, thus preventing It from escaping. Coulson battles Ward. Just as the portal is about to close, Coulson punches his metal hand into Ward -- killing him. Coulson and Fitz flee through the portal.
Zephyr One opens fire on the castle. It explodes! But the containment module rockets back up from the blast zone to Zephyr One just in time. Mack, Daisy, Fitz, and Coulson are safe and the portal is destroyed, but it’s a bittersweet victory, as Coulson and Fitz both have blood on their hands.
Later, Malick reels from his defeat only to find a lone survivor of the explosion…Grant Ward. But how? Is Ward now possessed by It?