When John March gets a phone call from his brother David, the lid comes off one of his family's closely guarded secrets. Prim, judgmental in his public life, David has been having sexual encounters with women arranged anonymously over the internet.But now one of his contacts has turned nasty-she has somehow got hold of David's private number and is leaving compromising messages on his phone that might destroy his marriage. David wants John to find the woman who he knows only as her codename, 'Wren', and put a stop to the harassment before it turns into something even darker.But John March is a gentle soul- he agrees to trace Wren through Manhattan's dark underbelly and reason with her if he can. But just as John gets a good lead on her, Wren's dead body is pulled out of New York's East River. She has been strangled. There are many people who will remember John March asking suspicious questions about the dead woman. So the race is on to find the real killer before John and his brother are arrested for a murder they did not commit.