Kaiser enthusiastically leads his annual Stuttgart police team-building day hiking to the wine mountain outside the city, but his dreaded motivational speech must give way to the discovery of a female corpse. It's nurse Inka Fellner, fatally stabbed in her 'cosplay' mythological gaming attire as cosmic amazons leader "Major Mimi", which she wore at the "Thalestris" club's latest photo-shooting there held by an ex-con comics and paraphernalia shopkeeper Martin Koch. Young motorcycle cop Ronny Schröder races off on his own, without telling he was an attending member too, contacting the gang on his own, assuming fellow "Waddler" Bernd Kreutler killed her for real as in the game. The official SOKO investigation must discretely rein in and suspend Ronny Schröder while looking into others, such as Martin's shop assistant Silke Stadler, and the theft of priceless original comic designs from the discrete creator, whom Inka nursed.
—KGF Vissers