Dirty Ex-Mas

When your best friend asks you to cover for her, the answer is yes. Even if she is a contract killer. The plan is simple: Sneak into the party, wait for the signal, shoot the bad guy, escape.What she failed to specify is it's an engagement party. My target? The groom. Who happens to be my ex. His best man? The one who got away. Did I mention he's a Fed? Now if I can just get out of this alive.