A serial killer who strikes on Sundays is back in business, and workaholic FBI agent Charlotte «Charly» Dow will do anything to catch him. For Charly, the investigation is personal. Her sister was one of the victims murdered during the psychopath's vicious killing spree. The tragedy destroyed Charly's family…even sending her mother into a mental institution.Now Charly has a new partner–agent Nick Marshall, who is just as reluctant as she is when it comes to trusting other people. Nick has his ow...