Mistyann is fifteen, unpredictable, unreliable, and violent. She's also gifted. Jonathan Diamond is forty-one. Looks a bit like Tom Cruise and he's going to Wales too. A failed musician and a recovering alcoholic he's now an Advanced Skills Teacher and he'll be in loco parentis for the week. Together the two of them develop an unlikely and dangerous alliance as they are forced to confront difficult truths about themselves.