A beautiful woman is found hanging in a park by leather cuffs while covered in caramel. Beckett notices that the cuffs are custom-made and may be easy to trace. Castle wants to know how she knows the bondage bracelets are custom-made. Frankly, we’re wondering the same thing. Sure enough, Barry from The Love Shackle (great name for a store) identifies the cuffs as his design. They were purchased by Tyler Benton and were made for his girlfriend, Jessica Margolis.
Tyler is devastated when he learns about Jessica’s death. He bought the cuffs as a joke because Jessica was doing research on the sociology of sexual bondage and domination for her PhD. Jessica’s roommate, Danielle, hadn’t seen the cuffs since Tyler gave them to her roomie.
Castle and Beckett meet Kelly, Jessica’s officemate, and Matt Haley, another PhD student at Hudson University. Matt admits to a rivalry with Jessica, but insists they were civil to each other. According to Jessica’s thesis proposal, she became interested in S&M after witnessing a dysfunctional relationship in her own life.