Echo is requested to go on a hiking trip.  She and her handler discover that this is no normal hiking trip.  He is attacked by a patrol man while she is hunted by the client.  On the run, Echo finds a shack where she drinks from a poisoned canteen.  She begins to have some hallucinations and flashbacks.  She gets help from her handler before he is shot.  She decides to take his gun and the fight to the client.