Early one morning, Isabel and her eleven-year-old daughter are walking across Regents Park when they come across a distraught-looking man sitting on a bench. They ask him if he's okay, but he doesn't know the answer, he doesn't even know his name. Isabel takes the man to hospital and hopes that will be the end of it. But when the tests show there's nothing physically wrong with him, and yet he still can't remember who he is, she realises she can't walk away. A powerful family drama.