When the body of a well-dressed man was found on Adelaide's Somerton Beach in 1948, police assumed that somebody would soon come forward to identify him. But nobody did. More than 70 years later, the mysterious case of the "Somerton Man", as he became known, regularly makes the lists of Australia’s most baffling unsolved cases. Was he murdered? Was he a Russian spy? Was it suicide? Or was he the victim of a love triangle? In an effort to finally unearth the truth, Adelaide University Professor Derek Abbott is pushing for the Somerton Man’s remains to be exhumed. Professor Abbott has a more personal motivation to solve the case: He is married to a woman he believes is the Somerton Man’s granddaughter.