The team investigates the 1999 disappearance of 28-year-old Washington, D.C., resident Joyce Chiang, whose body was found along the Potomac River months after she went missing after leaving a coffee shop. A couple years later, 24-year-old Chandra Levy vanished from the same area and suffered a similar fate. Could a serial killer be preying upon the petite brunettes of DuPont Circle?