The third season. - He killed his family

In 1965, an American family—a father, mother, and three children—lived in a luxurious 19-room mansion in New Jersey... a perfect life by all standards. But in 1971, everything turned upside down! The father, who seemed ordinary, was hiding a mysterious plan that had been woven silently for 18 years... and no one could have imagined the shocking end that awaited him!