Person A is an FBI agent and B is the criminal A has been trying to catch. A has no idea what B looks like but knows their initials and has been able to connect several of their crimes. B sees A in a bar and realises s/he is the FBI agent who has been investigating B. B wants to find out how much A knows so they flirt with A all night and end up sleeping together. B actually starts to like A and reasons that since they didn't find out much anyway they should try to keep the relationship going to keep an eye on the investigation. A and B have a relationship and fall hard for each other. One day A realises that B is in several pieces of surveillance footage from the different crimes and works it out. A confronts B who tries explaining that they stopped doing that for B and that they really do love A. A doesn’t believe B but can’t bare sending B to prison so they tell them to leave and never come back. Later A finds some kind of proof that B really did love A and/or committed the crimes for a good reason. A has to try and find B.