Karppi, wanted by police, continues to investigate on his own and encounters a disguised murderer. Henna, at the mercy of criminals, has to face death in the eyes. The grass helps Carp get rid of doubts.

Karppi and Nurmi track down the suspect in the ruins of an old monastery, but the murderer strikes and forces Karp to do desperate acts. The ultimate truth about Carp's death is also clear.