Mattes rushes to a reported theft after the extra pieces for a Brazilian expo are unpacked in Hamburg Maritime Museum by curator Bernd Koberstein. Checking the crates Mattes get bitten by a red-white-black-striped serpent, soon identified as the deadly coral snake, yet despite the zoo reptiles expert catching the snake and finding its fangs emptied, no real symptoms occur: there must be another victim, possibly the man who rudely rushed by, nearly toppled, senior regular visitors Dieter and Käthe Krieger. A fainted patient fits the bill, but that's only half the plot. Meanwhile Hans bought juvenile friend Lothar Huse's too cool bicycle, which Wolle allows the knave to use.
—KGF Vissers