Season: 5 | Episode: 1 | Length: 60m

In March 1973, 18-year-old Marian Beattie from Portadown went to a charity dance at Haddens Garage on the outskirts of Aughnacloy, Co Tyrone, with her best friend and brother. During the night she was seen dancing with a young man. Minutes after leaving with him, she was murdered. Her body was found at the bottom of a nearby quarry. This programme explores Marian's family's efforts to get to the truth of what happened to their sister that night and why after 50 years, the murder of an innocent 18-year-old woman remains unsolved.