Based on

Movies like Hotel der toten Gäste (1965)

London crime reporter Barney Blair has an appointment in his office with Janosch Kovac, the hotel detective at the Hotel Atlanta in San Remo. The informant wants to sell Blair some explosive background material, but it doesn't get that far because the man is stabbed to death beforehand. Blair goes to the hotel, where the film and music festival is currently taking place, to investigate the case himself and soon senses a big story.