Sarah, a grifter, witnesses the suicide of a woman who looks just like her. She picks up the woman's handbag and runs. Instead of solving the mystery of how they can look the same, she is confronted with more mysteries. Taking on the woman's identity she discovers they are clones and that there are more of them out there, living in a wide range of circumstances.
As Sarah tries to find out what is going on and who is responsible for it, someone starts picking them off one by one. In a race to find the reason for it all before the killer can get to her, Sarah doesn't know who to trust.
The episode titles for season one are taken from Charles Darwin's evolutionary text "On The Origin of Species" (published November 24, 1859) and for season two, the episode titles are quotes from the works of Sir Francis Bacon. Season three episode titles come from Dwight D. Eisenhower's televised Farewell Address to the Nation given on January 17, 1961 from the Oval Office.
This series is rated TV-MA.