November 1903: Clemence, young and inexperienced, is hired on a trial basis by Lady Marjorie, who decides Clemence is not an appropriate name for someone in service and changes it to Sarah. Being far too outspoken and having a tendency towards over exaggeration and drama, Sarah struggles to fit in and become accepted by the other servants.

June 1904: An artist, commissioned to paint Lady Marjorie's portrait, takes a shine to Sarah and convinces her to pose for him. The painting, depicting Sarah and her roommate, is a bit racy, and when the Bellamy's see it in a public exhibit, they fire both girls for what they wrongly conclude is "questionable behaviour."

August 1904: Finding themselves alone and having the run of the house, the junior servants indulge in a night of wild partying. When James, the Bellamy's son, show up unexpectedly, the party takes an unusual turn, causing Sarah to reevaluate her life. Unhappy with what she sees, she makes a monumental decision that will alter her course forever.

May 1905: When Elizabeth returns home from abroad, her parents plan her debut into society, but the spirited young girl has little interest. She reluctantly agrees, but at the last moment, has a change of heart and flees. Rose, more like a sister than a servant, steps up and makes the girl see the situation in another light.

December 1905: Elizabeth falls for a young German baron, whom her father is suspicious of. Richard quickly uncovers the Baron's secret, but as it turns out, Baron Klaus von Rimmer is hiding another secret, which Rose accidentally stumbles upon. The events of the evening compel one of the servants to betray not only the family, but the country as well.

October 1906: Mary, the new housemaid confides in Richard that she's pregnant, the result of an assault by a man who drunkenly forced himself on her. Insisting he must bear responsibility, she reveals the man is Myles Radford, the son of Richard's friend (and her previous employer), General Radford. Myles, outraged that Richard has the gall to question his integrity, gets even with a classless move that could have enormous legal, financial, and moral ramifications.

Summer 1906: Captain Hammond, a handsome young friend of James', graciously agrees to escort Lady Marjorie to the opera. Feeling a strong mutual attraction, they quickly realize how compatible they are, despite the age difference, Abuzz with gossip, the servants seem to be the only ones aware of what's going on.

April 1907: Believing destiny brought them together, Emily, the scruffy kitchen maid, falls deeply and hopelessly in love with a footman named William. When his mistress, Mrs. Van Groeben, learns about his relationship with Emily, she angrily orders William to stop seeing her, leaving Emily heartbroken and driven to an act of desperation.

November 1907: Everyone's been concerned about Mrs. Bridges, who's been despondent ever since Emily's suicide, but when they discover she took a baby from his pram when his mother wasn't looking, and brought him home with her, they realize she's suffering from a mental breakdown. Hoping to keep the incident quiet and protect everyone's reputations, the Bellamys return the baby to his parents and offer compensation, but refuse to divulge Mrs. Bridges' identity. The father, furious that they consider themselves above the law, has Mrs. Bridges arrested and during her hearing, Hudson makes an extraordinary gesture he hopes will keep her out of prison.

Autumn 1908: While providing food for the homeless, James and Elizabeth are surprised to run into Sara whose been living on the street. Elizabeth insists on taking her back to Eaton Place where she's given a job as a scullery maid. Sarah immediately reverts back to her old tricks and, claiming to be a medium, causes an uproar when she tries to conjure up the spirit of Emily during a seance.

James is visited by his friend Axel Ryttsen, a Swedish Army captain who lives for taking risks. With him is his valet, the handsome and charismatic Torkel Kraft. There is some scheming going on the manor house during their visit, but to what end?

Winter 1908: Elizabeth befriends a bunch of Bohemian-types, but is drawn to two in particular: Evelyn Larkin, a radical Socialist extremist, and her lover, Lawrence Kirbridge, a handsome, free-spirited poet. On the eve of her 21st birthday, with her parents out of town, Lizzy invites the entire group to Eaton Place, and is humiliated when the Bellamys return home unexpectedly and throw everyone out. Anxious to prove she's nothing like her parents, Lizzy is compelled to do something extreme, leading to a falling out with her parents and a harsh discovery about Evelyn.

June 1909: Elizabeth and Lawrence Kirbridge have fallen in love and, refusing to conform to society's rules, announce their plan to live together without marriage, resulting in pressure from all sides. After Lawrence gives in and starts pressuring her too, Lizzie finally succumbs. Meanwhile, Sarah fulfills her dream to perform on the stage when she takes a job in a burlesque show. James shows up and, now that she no longer works for his family, wants to pursue the relationship they've both wanted for nearly six years.

Things have not improved in the Kirbridge household. It turns out they have yet to consummate their marriage. Lizzie, unaware she's married to a gay man, is miserable and angry, making Lawrence miserable, too. Realizing he cannot fulfill that "need" for her, Lawrence decides to enlist the help of a friend to fulfill those duties for him.

Elizabeth comes home for Christmas without Lawrence. The Bellamys face another family crisis when it is discovered that Elizabeth is expecting a baby.

There is great excitement among the servants when King Edward VII attends a supper party at Eaton Place. During the evening the arrival of an unexpected visitor creates an emergency below stairs.

Thomas is approached by a blackmailer who claims to have love letters from Lady Marjorie to Captain Hammond.

The brothers of both Richard and Hudson are visiting, causing both men to do things they otherwise would not. For Hudson, it means putting on airs, and for Richard, the visit causes him to snoop, an action he considers beneath him.

Elizabeth returns home with her newborn daughter, Lucy, and the very disagreeable and old Nanny Webster, to look after "Baby".

Everyone's nerves are frazzled when Lord Southwold dies, Lady Southwold and her companion, Miss Hodges, spend a some time with Richard and Lady Marjorie and a valuable diamond brooch goes missing.

Elizabeth joins the suffragette movement, but in her effort to protect her, Rose is imprisoned.

The Bellamys are in shock when they learn that Eaton Place, which is part of the Southwold estate, must be sold in order to satisfy the terms of the deceased Lord Southwold's will. Adding to their worries is news of Elizabeth's involvement with Julius Karekin, a man they strongly disapprove of, but in the end, the relationship proves very beneficial.

Sarah is pregnant with Watkins' baby and Lady Marjorie has run out of patience with both of them.

Elizabeth's affair with Julius is over, James returns to England with his fiancée, Phyllis, and a major event marks the end of an era.

In the spring of 1912, Lady Marjorie prepares to visit Elizabeth in New York and James takes an interest in Richard's comely and respectable new secretary, Miss Forrest.