During another pub evening with his regular 'skat' (cards game) buddies, plumber Hans Dolei is killed on the toilet by a gas explosion. Forensics rule it's not the stinky gas from the passing canal, but willfully induced from outside. Prime suspect Olli Roschinski, his former apprentice, got deep in debt to buy a minority tontine share in Dolei's firm, which he now inherits. The team also turns to the third player and the ailing outdated pub, which wasn't insured. Then an armed episode claims a second life in a convoluted desperate ploy.
—KGF Vissers