Melanie Marsh is an American living in London. She is married to Stephen, the perfect Englishman - who knew the moment he saw her that she was his future. But when their youngest child is diagnosed with autism their marriage unravels at speed. Stephen runs back to an old girlfriend while Melanie struggles to help her son. Then Melanie hears about a man named Andy O'Connor who calls himself a 'play therapist'. Despite his lengthy client list, she is skeptical. But when he walks into the house and starts playing with Daniel it changes everything . . .