The film begins with a striking musical cue, leading us into a crumbling, neglected building. Inside, there’s an elderly man harboring animosity toward the color white—apparently because Heaven is portrayed as brilliant white light, and one doesn't typically reach it while still living. He has a suitcase on his bed, suggesting a desire to travel, yet also hinting that he hasn’t journeyed far in quite some time. Upon opening it, he finds himself transported back to an earlier point in his life, though he remains caught in the same situation, only with his memories and a sketch of a young woman for company. Was she his beloved, his wife, or perhaps his daughter? More recollections follow—this time featuring his younger brother and then glimpses of his own youthful athleticism playing football, even the appearance of his first chest hair. Now a young man, he’s interacting with his brother, but again, he's still in that same room, now physically able to leave. He emerges into what seems like a more pleasant space, perhaps suggesting he was simply there all along. The stop motion animation is truly beautiful. The animators demonstrate remarkable creativity in portraying someone who grows younger as the story unfolds—a sort of backward aging process—and it’s presented with the enthusiasm and happiness associated with memories held by a man who has little to anticipate now. Is he confined, receiving care, simply resting in his own bed, or is this all part of a dream?

Source on TMDB