Unknown is an awesome movie. This is a spine chilling thriller movie that unravels a great mystery of a man whose life is changed and is taken by another man. The story of this movie revolves around Dr. Martin Harris who after gaining senses from a long coma sleep realizes that his place has been taken up by exactly same looking person who is staying at his house living with his family. The clone is so exact and has so much knowledge about Dr. Martin that even his wife refuses to believe him and no one else except a young girl who appreciates his sentiments and is ready to team up with him to solve his problem and tell the world who he is.