Unknown is a 2006 American mystery thriller film directed by Simon Brand and written by Matthew Waynee.

It stars Jim Caviezel, Greg Kinnear, Joe Pantoliano, Barry Pepper, and Jeremy Sisto as a group of men kidnapped and locked in a factory with no memory of how they arrived there.

In the warehouse, the men find a newspaper featuring a story about the kidnapping of Coles, a wealthy businessman.

Various attempts to free themselves, including trying to attract attention through a hole in the wall, and shooting out a window, fail.

The handcuffed man recalls a harrowing incident from his childhood when he was comforted by his friend.

The jean jacket man recalls that he is part of the gang, but cannot accept that he is a criminal.

He is greeted by the snakeskin boots-wearing gang leader and chastised for letting things go wrong in the warehouse.

Chemicals spilled during the fight rendered everyone unconscious and induced temporary amnesia.

This sparks a memory that the jean jacket man was a cop working undercover in the gang.

As the leader looks over to see an empty grave, the broken nosed man comes out of the shadows to attack the gang members.

The rancher shirt man is Coles, and as both are being treated, Eliza arrives and hugs him.