Marina is adopted. She's always known this - but the circumstances of her birth remain a mystery. Baby Blue, the newspapers nicknamed her at the time, after she'd been found wrapped in a blue shawl, in the hallway of a large, shared house in London. 24 Harrington Gardens. That was the house. And it's still standing now Marina is an adult; still split into flats. And one of them is to let. Of course, Marina knows that the chances of her uncovering...