The Keys to the Street is a psychological thriller set in London's luxurious and exclusive Regent's Park area, where Mary accepts a house sitting assignment in order to escape her violent and disturbed ex-boyfriend Alastair. As a grisly series of murders occur in the neighborhood, and one by one the local homeless are brutally killed, she soon finds herself in the throes of a passionate love affair with Leo, a man with whom she shares a deep and complicated connection. But when she discovers Leo isn't who he seems, the mystery is just beginning as their love story spirals into a tale of obsession, redemption, and murder.