Peaches, a woman who has long tried to forget her past, finds herself in the waiting room of Brighter Days Inc., a facility specialized in memory manipulation. After signing an electronic consent form, she is taken into a room designed to allow her to relive four of her most treasured memories for one final time. Her journey begins as she watches old videos of her childhood family life, documented during her early years ("Intro (End of the World)").
The memories Peaches revisits are intensely personal and fleeting; each one is erased immediately after experiencing it. Her first memory centers around her youthful days and her connection to her family. She then moves on to her career as a singer, recalling the moments that brought her fame and the emotional highs and lows associated with her musical journey ("Eternal Sunshine" / "Dandelion").
In the third memory, Peaches wakes up in a post-apocalyptic scene, her home destroyed and flooded. As she surveys the devastation, she notices two significant items lying amidst the ruins: a teddy bear and a necklace ("Twilight Zone"). Her exploration leads her to a desolate neighborhood that has been completely razed. Unexpectedly, she walks toward a UFO and is abducted, which adds a surreal and supernatural element to her experience ("Supernatural").
The final memory unveils the perspective of Peaches' father, who founded Brighter Days Inc. Unfortunately, he is overcome with grief after losing his daughter, who appears to have been torn apart. He is seen reliving moments from his past, including the sentimental memory of gifting her the necklace. In a heartbreaking sequence, he collects her organs—her heart in a London pub and her brain from debris—and attempts to resurrect her by placing them inside a woman crafted in her likeness. Through a combination of music and electricity, he finally succeeds in bringing her back to life ("Hampstead").
The older Peaches, having completed her memory session, feels a sense of resolution and peace. The film concludes with a nostalgic scene where a young Peaches recalls a piece of advice to live each day as if it were her last. During the end credits, an acoustic rendition of "We Can't Be Friends (Wait for Your Love)" plays, recorded at Jungle City Studios, enhancing the reflective tone of the movie. This emotional journey explores themes of memory, loss, hope, and the enduring power of love, leaving viewers to ponder the delicate boundaries between reality and imagination.