: What makes a person "themselves" if a replica can do a better job?
: Sarah eventually discovers that she has gone into complete remission . Under the law, two versions of the same person cannot coexist. If the original person survives, but the clone refuses to be "decommissioned," the law mandates a duel to the death .
: Sarah (played by Karen Gillan ) is a woman living a detached life who receives a terminal diagnosis. To protect her mother and boyfriend, she opts for a "Replacement."
: Sarah spends time training her clone (Sarah Double) on how to be "her." However, the clone quickly begins to integrate into Sarah's life better than Sarah herself, winning the affection of her boyfriend and mother.
The film is known for its and clinical tone. It tackles: