Murder in the first life. Gwen Fishers first case

Anonymous figures surf the Internet every day to pursue their secret fantasies undetected. In her first case, Chief Inspector Gwen Fisher has to learn how closely the virtual and real worlds are connected. The single mother, who has only recently lost her beloved husband, is trying to get her life back under control when the killer strikes for the first time. With the help of her 14-year-old son, she learns things from a virtual parallel world on the Internet that she never thought possible.
Sparse clues point to connections that she is initially unable to interpret properly. Too late she realizes that the killer has already taken up the trail to her family in the real world.