Mario Landi was an Italian film writer and director.
Inspector Angelo De Paul is assigned to investigate a horrifying series of murders that have gripped Venice and left the authorities baffled.
A group of strangers are summoned to the secluded home of Patrick, a young man rendered comatose after a freak accident, but soon find themselves falling victim to Patrick's mysterious psychic powers and murderous rage.
Maigret is about to leave for the holidays but a colleague asks him for help in investigating the mysterious murder of a stripper and a noblewoman, both of which took place in Pigalle.
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