The end-of-season Tintagel Ball sets off an explosive chain of revelations and betrayals—and Nan's life will never be the same.

The end-of-season Tintagel Ball sets off an explosive chain of revelations and betrayals—and Nan's life will never be the same.

In New York, the scandalous St. George divorce trial is underway. Nan copes with further revelations about her birth mother.

In New York, the scandalous St. George divorce trial is underway. Nan copes with further revelations about her birth mother.

Tensions are set aside—for now—to help Jinny fight for her freedom.

Tensions are set aside—for now—to help Jinny fight for her freedom.

The buccaneers prepare for Lizzy's wedding day. Nan returns to face the music as things get more complicated.

The buccaneers prepare for Lizzy's wedding day. Nan returns to face the music as things get more complicated.

From sun-drenched Italy to a champagne-soaked English garden party, emotions run high and chances are taken.

From sun-drenched Italy to a champagne-soaked English garden party, emotions run high and chances are taken.

A betrayal, a reunion, and an unexpected spark—Lizzy's enchanted birthday party will be one to remember.

A betrayal, a reunion, and an unexpected spark—Lizzy's enchanted birthday party will be one to remember.

Amid the Tintagel spring gala, Lizzy grapples with whether to share crucial information with Nan.

Amid the Tintagel spring gala, Lizzy grapples with whether to share crucial information with Nan.

Nan's wedding day is in full swing, but a surprise appearance by someone from her past threatens to derail the festivities.

Nan's wedding day is in full swing, but a surprise appearance by someone from her past threatens to derail the festivities.