The publisher Konrad Bachleitner is seriously injured and taken to hospital after a climbing tour. There, the poison taxin can be detected in his blood, which must have been instilled in him by his environment. Since Bachleitner was not exactly popular, the SOKO team comes across a number of suspects: his alcoholic wife Fiona, his estranged son Ben, and a graphic designer who is currently conducting a lawsuit against Bachleitner's publishing house. In addition, there is Bernadette Zauner, who repeatedly sent silent messages to the dead man.