Map-obsessed Thomas spends his days and nights on a virtual tour of the world through his computer screen, believing he must store the details of every town and city in his head. Then one day, while surfing a street view program, he sees something that shouldn't be there: a woman being murdered behind a window on a New York street. When Thomas tells his brother Ray what he has witnessed, Ray humours him with a half-hearted investigation - until he realises Thomas may have stumbled on to a deadly conspiracy, which puts them both in danger ...