Eye for an Eye

Meet Detective Inspector Andy Gilchrist of the constabulary of St. Andrews, Scotland, as he races the clock to stop a serial killer
 
Six corpses have appeared in the cobbled back streets of St. Andrews in recent times, all known spousal abusers who suffered the same gruesome fate: stabbed to death in the left eye. But with no new leads left to explore, detective Andy Gilchrist is forced off the case.  
 
What is the significance of the left eye? Gilchrist can’t seem to focus on anything else, and with his career and his reputation on the line, he vows to catch the killer even if it means he must do it alone.