Hess uses unorthodox methods to prove a theory about the Hartung case. The detectives chase a lead linked to a text message. Rosa faces another threat.

When a disturbing discovery provides a lead to a possible target, Thulin and Hess hatch a risky plan to lure the killer.

Neither Thulin nor Hess can stop thinking about the unanswered questions hanging over their case. Rosa’s career unravels as a childhood memory surfaces.