Primal Instinct, a B-movie released in the year 2002, is based on the theme of BDSM. The movie is about Vanessa (Celia Xavier), who was a major star in the world of internet fantasy. She was involved in the activities of internet sex and bondage until she was murdered and the footage was released all over the internet. Vanessa's sister Celia (Celia Xavier), a lovely probation officer, goes undercover as a sex slave at a private club, The Castle where her sister used to work. Determined to find the truth about her sister's death, Celia goes deep into the shameless world. Russ (Michael Madsen), an FBI agent, offers assistance to Celia when he is given the case to solve the murder and find out who is involved in the bondage and sex business. As Celia goes deeper, she will require all the help she can get as her sister's murderer makes Celia his next target.