Amid a growing challenge to her power, Thatcher fights for her position. Charles grows more determined to separate from Diana as their marriage unravels.

As many nations condemn apartheid in South Africa, tension mounts between Thatcher and Elizabeth over their clashing opinions on applying sanctions.

Grappling with mental health issues, Margaret seeks help and discovers an appalling secret about estranged relatives of the royal family.

As Elizabeth welcomes Britain’s first woman prime minister and Charles meets a young Diana Spencer, an IRA attack brings tragedy to the royal family.

While Margaret Thatcher struggles with the disappearance of her favorite child, Elizabeth reexamines her relationships with her four children.