What begins as a routine assignment -- infiltrate a public building and retrieve monitoring equipment set up by APO -- goes horribly wrong. With the mission suddenly compromised, the true question becomes, Who's monitoring whom and why? Resourceful Sydney manages to complete the objective, but a split-second miscalculation during her escape endangers a civilian caught in the cross-fire. When haunting details of the victim emerge and the lead suspect is murdered, Sydney's carefully compartmentalized life threatens to unravel. Has she always made the right choices, knowing the inherent danger posed to those around her? Vaughn and Jack are understandably concerned. For a field agent, even the tiniest loss of focus can prove deadly....