Mary Jago, a young woman living in London has donated her bone marrow to save the life of a stranger. This generous act leads to the end of her relationship with her boyfriend. She moves into the neighborhood of Regent's Park which is the home for the homeless, often sharing food and conversation with the needy people. There is a series of murders of these homeless people by a dangerous killer, who leaves their bodies speared upon the railings of this park. Mary sets on a journey to discover the murderer overcoming all her insecurities. A thriller with the various vivid characters, the rich, poor, kind, dangerous, all crossing their paths.