FILMED BEFORE A LIVE STUDIO AUDIENCE
Newlywed couple Wanda Maximoff and Vision move into the town of Westview in a black-and-white 1950s setting. They attempt to blend in despite Vision being an android and Maximoff having telekinesis and reality-warping abilities. One day they notice a heart drawn on their calendar, but cannot remember what the occasion is. While Vision goes to his job at Computational Services Inc., Maximoff decides that the heart represents their anniversary. Their neighbor Agnes introduces herself to Maximoff and helps her prepare to celebrate that night. Vision amazes his co-workers with his speed but is unsure what his company actually does. He is reminded that the heart represents plans for him and Maximoff to host his boss, Mr. Hart, and his wife for dinner. Maximoff and Vision struggle to hide their abilities while making a last-minute dinner. While interrogating Maximoff and Vision, Mr. Hart chokes on his food and Vision uses his abilities to save him. All of this takes place in the fictional sitcom WandaVision which someone is watching on a television.

DON'T TOUCH THAT DIAL
In a 1960s setting, Maximoff and Vision hear strange noises outside their house. They prepare their magic act for a neighborhood talent show. Maximoff and Agnes spend the day with the show's planning committee, led by Dottie, and Vision attends a neighborhood watch meeting, where he accidentally swallows some chewing gum. Maximoff befriends another neighbor, Geraldine, and notices more strange things: a yellow and red toy helicopter in their black-and-white world; a voice on the radio that seems to be speaking to her; and a red bloodstain. Thanks to the gum caught in his internal mechanisms, Vision appears to be intoxicated at the talent show and publicly reveals his abilities. Maximoff uses her own abilities to make this look like simple magic tricks and fixes Vision by removing the gum. They return home, and Maximoff becomes visibly pregnant. When they see a strange beekeeper emerging from a manhole on their street, Maximoff resets their reality to before the figure appears. The setting changes to full color as it moves to the 1970s.

NOW IN COLOR
In the 1970s setting, Dr. Nielson says Maximoff is four months pregnant and everything is fine before leaving for an intended holiday with his wife. While Vision sees Nielson out, he sees his neighbor Herb unknowingly cut through their wall. Maximoff and Vision paint a nursery while debating what to name their child before Maximoff's pregnancy elevates to six months. When she begins contractions, her abilities begin to move things in the house and eventually shut down the entire town's power. Geraldine arrives and helps Maximoff deliver twins Billy and Tommy. Vision catches Agnes and Herb gossiping outside. They talk about Geraldine, who has just arrived in town and does not have a home or family. Inside, Maximoff interrogates Geraldine after the latter reveals that she knows Ultron killed Maximoff's twin brother Pietro.[a] Maximoff notices that Geraldine is wearing a pendant with a sword emblem on it. When Vision returns, Geraldine is gone. Outside of Westview, Geraldine emerges through a wall of static and is surrounded by S.W.O.R.D. agents.

WE INTERRUPT THIS PROGRAM
Captain Monica Rambeau, an agent of S.W.O.R.D., returns to life following the Blip[b] to find her mother Maria has died of cancer. Three weeks later, Rambeau returns to work and is sent by Acting Director Tyler Hayward to help FBI agent Jimmy Woo with a missing persons case in Westview, New Jersey. They discover a hexagonal static CMBR field surrounding the town, which Rambeau is pulled into. Within 24 hours, S.W.O.R.D. establishes a base around the town and sends drones and an agent in to investigate. Dr. Darcy Lewis studies the phenomena and discovers broadcast signals for the sitcom WandaVision. They use these to observe events inside the town, learning that real residents have been "cast" in the sitcom and seeing Rambeau appear as "Geraldine". Lewis and Woo unsuccessfully attempt to use the radio to contact Maximoff. When Rambeau mentions Ultron, Maximoff casts her out of the town. Maximoff then temporarily sees Vision appear as he did when he died, before settling back into her sitcom life with him.

ON A VERY SPECIAL EPISODE...
In a 1980s/early 1990s setting, Maximoff and Vision struggle to stop Billy and Tommy from crying. Agnes offers to help look after the boys, but Vision questions her behavior. He and Maximoff are interrupted when Billy and Tommy suddenly age-up to 5 years old. When a dog appears at their house, the boys ask to keep it and Agnes suggests the name Sparky. Maximoff almost reveals her abilities to Agnes, concerning Vision, while the boys age-up again to 10 years old. At work, Vision reads an email from S.W.O.R.D. that reveals the situation in Westview. He breaks through to a real Westview resident and learns that Maximoff is controlling the town. S.W.O.R.D. sends a drone from the 1980s into Westview which causes Sparky to run off. Hayward orders the drone be used to kill Maximoff, but she emerges from the barrier with it and warns Hayward to leave her alone. Agnes finds Sparky dead. Vision confronts Maximoff about her actions, but they are interrupted when "Pietro" arrives. Watching the broadcast, Lewis notes that Pietro has been "recast".

ALL-NEW HALLOWEEN SPOOKTACULAR!
In a late 1990s/early 2000s setting, Maximoff wants to spend Tommy and Billy's first Halloween together as a family, but Vision tells her that he is going to patrol the streets with the neighborhood watch. "Pietro" offers to step in as a father figure and takes the boys trick-or-treating, causing mischief with his super speed, which Tommy is revealed to have inherited. Meanwhile, Vision explores further away from their house and finds residents of Westview standing frozen in their positions, including Agnes. Vision speaks to Agnes' real self and she tells him that he is dead. Outside Westview, Hayward orders Rambeau, Lewis, and Woo to leave the base for disagreeing with his decision to attack Maximoff, but they sneak inside and hack into his computer to discover that he has been tracking Vision's vibranium signature. Vision tries to push through the static wall, but he begins to disintegrate. Billy senses this and tells Maximoff, who expands the hexagonal static wall. Vision, Lewis, and several S.W.O.R.D. agents are enveloped by the new boundary.

BREAKING THE FOURTH WALL
In a mid-to-late 2000s setting, Maximoff decides to have a day to herself and Agnes agrees to babysit Tommy and Billy. Maximoff sees various parts of her house constantly changing and is unable to control them. Vision wakes up to find the S.W.O.R.D. agents inside the boundary are now members of a circus. He releases Lewis from the spell and she tells Vision about his death and the events that led to the current situation. Outside of Westview, Rambeau and Woo meet with loyal S.W.O.R.D. personnel and obtain a vehicle designed to cross the barrier. When the tactic proves unsuccessful, Rambeau decides to enter herself. She passes through the static wall and emerges with seemingly heightened vision. Rambeau confronts Maximoff, but Agnes tells Rambeau to leave and takes Maximoff to her house. Maximoff looks for the boys in the basement and discovers a strange lair. Agnes introduces herself as a witch named Agatha Harkness and reveals that she has been disrupting Maximoff's life, including sending an imposter as "Pietro" and killing Sparky.

PREVIOUSLY ON
In Salem in 1693, a coven of witches led by Harkness' mother Evanora attempt to execute Harkness for practicing dark magic, but she drains their life forces. In the present, Harkness demands to know how Maximoff is controlling Westview and forces Maximoff to relive key memories. Harkness learns that Maximoff has had magical abilities since she was a child which were amplified by the Mind Stone, and she has always enjoyed sitcoms. After the Blip, Maximoff visited S.W.O.R.D. to recover Vision's body, but Hayward refused to let her bury him. Unable to feel any life in Vision, she drove to a lot in Westview that he had bought for her before his death so they could live there together. In a fit of grief, she manifested a house on the lot and a new version of Vision, and extended the Hex across the entire town. Harkness concludes that Maximoff possesses a legendary form of magic called chaos magic, and dubs her the "Scarlet Witch". In a mid-credits scene, Hayward reactivates "The Vision", the now all-white, reassembled original body.

THE SERIES FINALE
Harkness attempts to take Maximoff's chaos magic, but is interrupted by The Vision who tries to kill Maximoff. Maximoff's Vision intervenes and fights The Vision throughout Westview. Harkness frees the town's residents from Maximoff's control, and they convince her to open the barrier. She stops when Vision and the twins begin to disintegrate, but not before Hayward and S.W.O.R.D. enter. Rambeau learns that "Pietro" is an actor named Ralph Bohner and frees him from Harkness' control, before helping the twins stop S.W.O.R.D. The Vision flees after Vision restores his memories. Maximoff places magical runes around the barrier that prevent Harkness from using magic, and traps her in the "Agnes" persona. Maximoff says goodbye to Vision and the twins before collapsing the Hex and going into hiding. In a mid-credits scene, Hayward is arrested while Rambeau is informed by a Skrull that a friend of her mother's wants to meet. In a post-credits scene, Maximoff hears the twins cry for help while studying the Darkhold in her astral form.