Four bystanders in the wrong place at the wrong time. Witnesses to the shocking shooting of a teenage boy. A moment that changes their lives forever. Fiona a midwife is plagued by panic attacks and unable to work. Has she the strength to testify? Mike a delivery driver and family man faces an impossible decision when his frightened wife forces him to choose - us or the court case. Cheryl a single-mother doesn’t want her child to grow up in the same climate of fear. Dare she speak out and risk her own life? Zak a homeless man offers to talk in exchange for witness protection and the chance of a new start.