A group of young American heiresses are changed forever when they're whisked across the Atlantic to London.

Conchita hosts a raucous country house party. Jinny and Lizzy go head-to-head for the same man. Nan reveals a secret.

At the exclusive Tintagel ball, Nan considers the prospect of becoming a duchess. Conchita struggles with her mother-in-law's approval.

The girls return to New York for a grand celebration. Nan seeks answers from her family. James begins to manipulate Jinny.

Things unravel during a weekend at Guy's family home, as Nan finds herself feeling torn. Mabel and Honoria get closer.

The gang head to Scotland for a Christmas getaway. Lizzy makes a confession. James' behavior escalates. Nan faces a hard choice.

The Brightlingseas host a New Year's Eve party where the bombshell news is the hot topic. Tensions flare as Theo and Guy's rivalry explodes.

Nan must figure out her path forward. Jinny feels trapped. Mrs. St. George reckons with the state of her family.