Ex-con, Angelo Vasquez, reformed for ten years but unemployed, was murdered in the home of his fiancée, Emma Briggs. She ran, took hostages in a dentist's office and asks for Castle, whom she claims to trust, unlike the police, to prove her innocent of the murder. Beckett now is the one officially out of the loop yet allowed to work with the team. They find out incriminating elements from Emma's past, but Castle keeps finding interpretations potentially in her favor while believing she is being framed.
—KGF Vissers