Nick Shannon is a convicted killer. But don't let that put you off. He had his reasons.Seven years ago his sister was paralysed by a hit-and-run driver. His fierce love for her made him agree to end her agonising pain with a heroin overdose.Now Nick's out of prison. All he wants is to put his life back together - and to find the man who crippled his sister and killed her boyfriend.But it's not long before Nick finds himself in trouble with the police again.Nick goes to meet his boss at home. But he finds him with his head cut off . . . And now Nick's the prime suspect.