 The story is based upon writer Jonathan Asser's real-life experiences as a voluntary therapist in a London prison.The film was critically acclaimed and won numerous awards including the BAFTA Scotland 2014 Best Film and Best Director Awards, seven BIFA nominations and holds a remarkable 99% Rotten Tomatoes score.Sigma also co-produced Jonathan Glazer's multi-award winning "Under the Skin" (2013) starring Scarlett Johansson.