Sara an outsider, street educated comes back in Toronto after disappearing for 10 months. In the subway she witness a murder of a woman who looks like the exact copy of her. She makes a quick decision and snatch her purse that the woman left behind. She gets into a universe that is more intriguing as she comes to find out. I do not want to reveal more than that on this series. It is an original idea Sci-Fi when Tatiana Maslany plays several character and she is wonderful it. she was nominated for a golden globe for Best actress. the rest of the cast is terrific here is a talented cast who kick ass in the is series. a definite must see.