When the beloved 200-year-old Sycamore Gap tree on Hadrian’s Wall is mysteriously felled overnight, public outrage erupts worldwide. This gripping two-part true-crime documentary follows Northumbria Police’s unprecedented investigation, with exclusive access to detectives, witnesses and never-before-seen evidence. As officers untangle a bizarre case with no CCTV and no witnesses, the series explores the cultural impact of the tree’s loss and the global fight for justice in one of the UK’s most unusual environmental crimes.