Henry Altmann is an irritable, depressed man living in Brooklyn who constantly finds himself at odds with the people around him, including his estranged family and co-workers. During a routine check-up, he encounters Dr. Sharon Gill, a substitute doctor at the clinic. Frustrated by long wait times and irate at life in general, he lashes out at her. In a moment of impulsive frustration and overwhelmed by her own personal issues, Dr. Gill tells Henry that he has a fatal brain aneurysm and only 90 minutes to live. Shocked and panicked by this news, Henry storms out of the clinic with a chaotic mixture of anger and urgency.

As Henry grapples with his supposed death sentence, he embarks on a frantic journey to make amends and find some sense of closure. He races through the city, determined to right wrongs and reconnect with loved ones before his time runs out. Meanwhile, Dr. Gill, ridden with guilt and worried about the potential consequences of her actions, sets out to find Henry and rectify her mistake. Through a series of encounters, near misses, and emotionally charged moments, both Henry and Dr. Gill confront their personal demons and wrestle with themes of forgiveness, redemption, and the value of time.