The song itself uses the suburbia conceit as an extended metaphor for the beginning of her relationship with Matty (he's the neighbor she runs away to Florida with, Joe is the cheating husband.) For more eloquent and detailed thoughts on the narrative of the song you can check out Jaime @cages-boxes-hunters-foxes's post here.

The video is really dense, and I'm not 100% confident in every aspect of my interpretation, but I feel pretty sure that it's making extensive use of visual metaphor in order to tell roughly the same story as the song, just in a different setting. To start, Taylor wakes up chained to a bed in a white dress.

To me this suggests that she's been driven mad by being left at the altar, and is now trapped, surveilled and controlled, in a type of asylum. This represents the end of her relationship with Joe--waiting for a marriage that never came, feeling trapped, mentally unwell etc.

She then takes 'forget him' pills which reveal Post's tattoos on her face when she looks in the mirror.

This represents Matty (the "miracle move-on drug") and shows that he made a mark on her while she was still in the asylum--that is, still in her relationship with Joe. Additionally, in the wide shot where we see the mirror, its size and shape are very reminiscent of a one-way mirror, often seen in interrogation rooms and psychological experiments, further reinforcing the idea that Taylor is imprisoned here.

She then is able to go to the typewriter room and do her work, creating art about how she's feeling, shown by her repeatedly typing "I love you, it's ruining my life" on the typewriter. She's still in pain and feeling trapped. While there, she encounters Post and they create art together, which creates beauty and color in her life. The blue and gold obviously reference her writing about Joe, but the fact that her work is gold and Post's is blue may be a deliberate choice to draw parallels between Matty and Joe, as she does on numerous songs throughout TTPD.

The next scene, where Taylor's hair is down and she and Post are wearing the same black coat and pants, takes place inside her head (symbolized by the shape of the papers they're laying on.) She is dreaming about them being free and creating art together, represented by the papers surrounding them and book she's holding, which has the word "us" written on the cover. She's writing their story before it's begun.

She then reaches for his hand in her fantasy, accepting and asking for this relationship

Then we see that she's being studied and experimented on--the results of the lie detector test read "I love you, it's ruining my life." Her pain is an object of fascination.

Interestingly, Post is part of the group experimenting on her, but when the experiments begin to cause her pain, he liberates her.

This inspires Taylor to destroy the place where she's been trapped, which we see through her opening the filing cabinets that cover the walls and destroying the mirror. I also find the shot of her standing still while papers burn around her interesting and significant; I interpret this as Taylor destroying her own work about Joe. By choosing to leave, she is metaphorically burning--rejecting--the story she wrote about them.

Finally, Taylor and Post enter the dangerous outside world together; the rain echoes the lyric "I chose this cyclone with you" on the album's title track. While I do feel the meaning of Post being in the phone booth is somewhat ambiguous, the framing and the accompanying lyric--"I've been calling ya but you won't pick up" suggest that he's attempting to communicate with her but can't reach her. They are free of her prison, but still separated.

Then, he hangs up the phone and reaches for her hand, and she takes it. The final shot of the video is a close up on their linked hands, presenting us with a cautiously optimistic ending--they are lost and vulnerable in the middle of a storm, but they have each other.