For 30 years FBI scientists Olivia St Martin has lived with guilt and with one abiding certainty that while she wasn't able to save her sisters life she did testify and help convict the rapist and killer. When shocking new evidence exonerates the man Olivia assure she saw abduct her sister she breaks every rule in the book to uncover the tree. Driven by the possibility that she put the wrong Man Behind Bars Olivia discovers that a serial killer has been at large all these years. Believing that the monster has just struck again in Seattle Olivia lose her life and poses as a field agent sharing her unofficial investigation with the hard work in Seattle cop. Olivia doesn't want to lie to detective Zach Travis. And she certainly doesn't want to fall in love. But ask the investigation into intensifies oblivions act find that they're rapidly losing control over their hearts their secrets and a case that threatens to consume them