Hunter learns that Dr. Tolhurst had a secret association with showgirl Rosie Glow, and she now becomes the only lead in the investigation of Tolhurst's death. Hunter and Eve Halliday go undercover and follow Rosie to Surfer's Paradise. While scuba diving, an attempt is made to kill Rosie by Brisbane CUCW agent Jim Bettman, and Hunter combats a shark to save her life.