Castle tells Beckett of the video he found of himself in Hollywood. Meanwhile, the NYPD investigates the murder of a police academy student shot dead by a gun belonging to the academy.
The killing of a police rookie with an NYPD academy service gun is tied to the present class's female top student, so Becket, the best ever, goes undercover. The trail points to the Irish mob and a mole, who tie in trough love. Meanwhile Castle decides after long hesitation to read the message to himself he warned against and next to tell Becket it points to her nemesis.—KGF Vissers