Sean Archer is Top-FBI-agent und already since years in the search of one man: Castor Tory, a brillant criminalgenius! The reasion: 7 years ago, Troy killed Archer's son. Now it seems, Archers did it finally and found him. But what looks like the end of the hunting, is the start of cruel game of life and death. Castor placed a nuclear bombe somewhere in Los Angeles and only his brother sitting in the prison knows where.
It seems there is now way out. Suddenly two FBI-colleagues come to Archer and suggest him an operation. He shall become Troy! How? The latest technology makes it possible to change the faces of people. With Troy's face Archer has Pollux' faith and can find out where the bombe is hidden to defuse at the right time.

The operation goes well and Archer/Troy is brought to the high-security prison, where Pollux is taken into custody too. In the meantime Troy awakes out of his coma. He forces the doctors to change him into

Archer, and kills them after that, like all others which know of the alteration. Now they aren't any witnesses anymore who know, that Archer is actually Troy and Troy is actually Archer.
Troy contacts his brother and Archer's plan to get to know something from him, breaks in pieces. Pollux is dismissaled soon, through the order of his brother with the face of Archer.
Archer risks an escape and he gets to his own house. But his wife only recognizes him as the man who killed her son. He can convince her to take a blood test of her so-called husband. Troy doesn't have the same blood group as Archer.

At the funeral of Archers boss who is said to have died because of a heart attack (but in true through Troy), there is the crucial fight between Archer and Troy. They have a fight through the church, the harbour and over the water to the other end of the harbour. But the winner is sure: It's Archer, with the face of Troy. The back-alteration also goes without problems and Archer returns with his own face

back home. And he takes a little boy with him. It's Troy's son.
 
 

Criticism:
A film a bit different than others! Who other has the idea to change into his worst enemy? The actors were brillant when they played each other. It seems the director really used masks and didn't simply change the actors.