A perplexing series of deaths in Vienna, Austria are linked to murders in Los Angeles, California. Austrian celebrity Jack Unterweger is unmasked as the world's first transatlantic serial killer, whose been reporting on his own murders and hiding in plain sight all along. 

Lynette Dawson, a loving wife and mother, disappears from her Australian home in 1982; days later, her husband, Christopher Dawson, moves their teenage babysitter into their home. It will be 40 years before the case is finally solved.