Terry Hitchcock is 57 years old when he decides to run 75 marathons in 75 consecutive days, pushing a stroller carrying his gear across the country to raise awareness for single parents raising children alone. He took on the role himself after his wife died of breast cancer, leaving him to bring up three young children. The film follows him mile by mile through freezing rain and stretches of extreme heat, tracking chest pains and bone fractures that would end most attempts, narrated by Billy Bob Thornton. His teenage son travels with him for part of the route, and the footage stays close to the strain between them as fatigue wears down both the run and the relationship. The pace is unglamorous by design: aid stations, motel rooms, and the daily grind of getting a damaged body back on the road. What the film tracks isn't a record attempt but an argument, made through 75 straight days of running, that a single parent's exhaustion deserves to be seen.