Captain Alexei Korolev has nothing to complain about. But for the first time in a long time, Korolev is about to be truly happy: his son Yuri is coming to visit for an entire week. Shortly after Yuri's arrival, however, Korolev receives an urgent call from his boss - it seems an important man has been murdered, and Korolev is the only detective they're willing to assign to this sensitive case. And the consequences of interfering with a case tied to State Security or the NKVD can be severe. Korolev is suddenly faced with much more than just discovering a murderer's identity; he must decide how far he'll go to see justice served... and what he's willing to do to protect his family.