In the haunting psychological thriller "The Regret," a successful architect named Julian finds his carefully constructed life unraveling after a tragic accident that claims the life of his younger brother. Consumed by guilt and haunted by what-ifs, Julian discovers a mysterious antique mirror that allows him to glimpse alternate realities where he made different choices. As he becomes increasingly obsessed with these parallel worlds, he begins to lose his grip on the present, straining his relationship with his devoted wife and alienating his few remaining friends. Directed with atmospheric tension by David F. Sandberg, the film stars Jake Gyllenhaal as Julian, delivering a raw and emotionally devastating performance, alongside Florence Pugh as his wife Sarah, who must watch helplessly as the man she loves spirals into an obsessive quest for redemption. Blending supernatural elements with a deeply human story of grief and forgiveness, "The Regret" explores the dangerous allure of second-guessing fate and the painful truth that some mistakes can never be undone.