AJ. Manglehorn, a solitary locksmith living in a small town, has never recovered from the loss of love for his life, Clara. Obsessed by his memory, he feels closer to his cat than the people around him and prefers to find solace in his work and his daily routine. Despite all this, he has a fragile human relationship by maintaining an intermittent contact with his son, feeling a pride badly placed for his former protégé who has turned away from the right path and building a prudent friendship with a woman with a big the bank. As a new love emerges, it finds itself at the crossroads and must choose between staying bogged down in the past and living the present.