Would you watch this film?

I've got a story idea in my head, its all up in the air but its basically about a young teenager in Prison who sees a psychiatrist/psychologist. Its going to have a 12 Angry Men vibe in the sense its basically filmed in one room. I thought about Robson Green as the Doctor, a bit like Tony Hill or sort of a spin off from Wire in the Blood. The story is a long the lines of the girls conviction, the doc needs to find out the truth because theres loose ends but the girl is messed up and debates some controversial things with him like the things shes seen in prison whilst giving snippets of the truth behind whats shes done and whether or not shes taking the blame for someone else. There'll be humour and a little action but primarily in one room. Its not finalised or anything, just a rough idea. Would you watch it?