A bird in winter

Bird is a woman on the run. One minute, she's undercover in the Service - the next, she's walking out on her job, her home, her life. It's a day she thought might come, one she's prepared for. But nothing could prepare her for what will happen next. As Bird tries to work out who exactly is on her trail, she must also decide who - if anyone - she can trust. Is her greatest fear that she will be hunted down, or that she will never be found ?