Takes place around season three. Beckett is still dating Josh, much to Castle's disappointment. Castle has realized he wants to be in a relationship with Beckett.
Coonan is prepared to make a final stand, descending in the precinct elevator with Castle as his hostage.
As Beckett dangles from a building she realizes she wants more than to find her mother's killer. She wants Castle.
Castle and Beckett after being stuck in the freezer. Castle sees Beckett talking to Josh and realizes he's done. But then Beckett has to go and start calling his name as he walks away.
Beckett and Castle meet at one of his book signings. Happens not too long after Beckett's mother dies.
A case has Beckett and Castle reentering a magic shop where they both used to love to go to as kids. But had they ever seen each other there before?