At the turn of the 20th century, tensions in Europe begin to rising. After the death of her son Norman John, Margaret, a young woman trapped in a violent marriage, flees to Europe with her young daughter Nonn.

Margaret works to make ends meet and return to Nonn. An opportunity to move in with a family and become a horse trainer finds Nonn tangled in a web of temptation and betrayal.

Now a musical performer on the streets of Paris, Margaret finds powerful backing from a wealthy benefactor.

In an effort to restore her reputation, Margaret has an arranged marriage with Astruc. In Paris, she runs a flower shop, but a world of danger and darkness lies beneath the veneer of happiness.

Margaret is now Mata Hari, a superstar performing artist having a torrid affair with the powerful Castello. When she meets prestigious art patron Sergey, she finds herself at another crossroads.

In 1910, Mata Hari discovers an intimate betrayal and is drawn into a web of double-crossings and murderous cover-ups.