When someone goes missing, lives are irrevocably changed. Those left behind are plunged into a sense of limbo, not knowing why their loved one has left or if they are still alive. Critically acclaimed drama Missing is set in a busy but under-resourced Missing Persons Unit in Dover, run by DS Mary Jane Croft. Mary harbours a dark personal secret - a missing sister of her own. As Mary and her team work to solve live cases, Mary continues her quest to find out what happened to her sibling.