Scotland Yard investigates a series of murders where the victims have died by snake venom poisoning.
A rather convoluted plot, which has random scenes that don't quite gel, also much of the film had dialogue and lacks excitement. The plot never really catches fire either; nor is the mystery all that engaging, but it's still mildly distracting, mainly due to some stylistic touches and bizarre POV shots - a character eating a carrot - from the inside of his mouth, Klaus Kinski playing a weird character who likes to kidnap and kiss snakes and a murderer known as The Snake picking off his victims using a dart gun dipped with venom. The second half is better than the first, but it's nothing remarkable.