How can you prove your innocence when you can't remember the crime?

Being a cop runs in Billy Harney's family. The son of Chicago's Chief of Detectives whose twin sister, Patti, also followed in their father's footsteps, Billy would give up everything for the job, including his life.

After a brutal shooting, Billy is left for dead alongside his tempestuous former partner and an ambitious assistant district attorney out for blood. But somehow Billy survives. He remembers nothing about the events leading up to the shootout and is charged with double murder.

Desperate to clear his name, Billy retraces his steps to get to the bottom of what happened. When he discovers the existence of a little black book that everyone who's anyone in Chicago will stop at nothing to get their hands on, Billy suspects it contains the truth that will either set him free, or confirm his worst fears...