Dangerous secrets are uncovered by Cass Raines as she helps a recovering drug addict find her missing teen daughter. We visit the dark side of the city of Chicago and the equally dark side human nature in a novel that is well written and shiveringly exciting. A 15-year-old girl from foster care is missing and a Chicago winter is no time to be on the streets. Cassandra Raines is a former police officer with the Chicago Police Department, who after a horrific incident resigned from the force and became a Private Investigator. This is the fourth book in the series but it's the first time I’m meeting Cass Raines. Even though the book is the fourth series, if this one is any indication, they read well as standalones. The book was a page-turner. Tracy Clark allows Cass to completely take the lead, guiding readers through the investigation and allowing us to solve the case with her. The further I got into the story, the more invested I became into finding the missing Ramona and learning why she ran away at all much less during a brutal Chicago winter. When we do find out, the reason leads us to even more questions. Ramona is holding secrets... some dark enough to kill for. ( )