A Sister's Secret

Twin sisters play a dangerous game of deception when they secretly swap places on their thirtieth birthday. But the harmless prank turns deadly when one of them is brutally murdered. The surviving sister must keep up the charade while hunting down the killer, fearing that she and her new family may become the next targets. Based on real events.

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Some movies that have similar genres and were produced around the same time as A Sister's Secret include Parasite, Anatomy of a Fall, Killers of the Flower Moon, The Imitation Game, Prisoners, The Accountant.