The clock is ticking and psychopath Vince O'Dempsey, after so many decades of freedom, is finally held accountable for murder. Justice may be served in the McCulkin case, but countless questions remain unanswered. What of the string of missing persons - from prostitutes and low-level criminals to drug crop cooks, female backpackers and even a four-year-old child - that police think may be linked to Vince? With Vince in his 80s, it's a race against time for cold case detectives to resolve these mysteries. And finally, have we found Vince's private graveyard, and the last resting place of Barbara, Vicki and Leanne McCulkin?