Conny Mey is ordered to the train station early in the morning – still in jogging clothes. A bloodied corpse with a gunshot wound was found on the night train from Warsaw, a suspect fled when the police arrived. Frank Steier, who has just been released from rehab after suffering a stab wound, is also already on site. Everything looks like a robbery murder. The investigator duo Frank Steier and Conny Mey visit Elsa Lange, the murdered man's wife, to tell her the sad news. OfThey learn that her husband was a paramedic with the Bundeswehr in Afghanistan, but was fired three years ago for drug abuse. Eventually, Mey and Steier find out that the fugitive main suspect, Stanislav Kilic, and Elsa's husband, Rüdiger, knew each other from Afghanistan. Both were involved in shady deals. Did Stanislav want revenge? The case takes a new turn when military police suddenly show great interest in Stanislav...