A girl is found murdered in a water tower. Turns out she was hacking a law firms system to investigate the death of her friend. The lawyer who was helping her turned up dead as well. A client had accidentally killed the victim’s friend and used his brother to kill those who knew anything.
Beckett flies to DC to interview for the job. The interview goes well and Gates gives her a high recommendation.
Castle finds out she went to DC where she admits she interviewed. He is upset she didn’t include him and thinks she is leaving him.
Beckett admits to her dad she wants the job and is later offered it. Before she can tell Castle, he gets down on one knee and proposes. We’re left waiting for her answer.