A journalism graduate student grieving her mother's suicide. She becomes the primary target when contacted by the serial killer under the code name ISO_17.
Fiona's friend who supports her investigation
Fiona's friend who supports her investigation
Fiona's friend who supports her investigation
Fiona's friend and possibly colleague
Fiona's friend who supports her investigation
Detective working with Fiona's father on the case
The killer Fiona is investigating
Fiona's therapist helping her cope with psychological strain
Fiona's father who is a sheriff helping with the investigation
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