In the early hours of the morning in a quiet Milton Keynes street, a single bullet was shot through an open window. The victim was a 19-year-old man. What followed was a frantic 999 call and an investigation by Thames Valley Police to find the culprit. This documentary follows the case as the detectives try to piece together the moments leading up to that fatal shot. But it soon turns out there is more to the inquiry than meets the eye with a potential second suspect.