Joseph P. Kennedy, Sr., rules over his family as a patriarch and a conductor, orchestrating the different events of its life with a firm grip. When the heir apparent, his son Joe Jr., is killed in action in World War II, the father turns to his next son John, known as Jack, as his hope for becoming President of the United States. With his dad's political maneuvering, Jack marries Jacqueline Bouvier and becomes President. In his time in office, he faces serious tension such as with the Bay of Pigs Invasion and the Cuban Missile Crisis. He perseveres publically but has multiple affairs privately. When he is assassinated in Dallas, Texas, Jacqueline mourns along with the rest of the world. Jack's brother Bobby takes up the family mantle and seeks the presidency, but his life is also cut short by assassination.