It's a love story about a husband and wife, played by Jake Johnson and Rosemarie DeWitt. It's about the pleasures and pains of building a family with someone, and maintaining the excitement of a relationship over a long period of time.
Based on actual events of American serial killer Edmund Kemper, who murdered his grandparents at age 15 and, after being paroled for that crime, killed eight women in 1972 and 1973 including his own mother.