After being diagnosed with a rare form of dementia that has a rapid decline, John Knox tries desperately to continue his work as a hitman, with memory loss getting in the way. When John's son Miles shows up at his door begging for help because he's killed the man who impregnated his daughter, John goes into overdrive with his friend Xavier to cover up the crime. Unfortunately, his good intentions for Miles backfires, and soon, his son is involved in John's criminal world.