Dr. Ruth Hartland rises to difficult tasks. She is the Director of a highly respected trauma therapy unit. Confident, capable and predominantly in control. But today, in the run up to her son Tom's birthday, one question preoccupies her: where did Tom go when he disappeared? When her last patient of the day - a young man suffering from PTSD - arrives at the unit, Ruth is floored. With his golden curls and Dr Martens, Dan Griffin looks shockingly like her missing son. Ruth knows exactly what she should do in the best interests of both herself and her client. The thing is, she doesn't do it.