A young boy arrives in Venice (Italy, not California) to find his father. After a phone call with him at his arrival, the father disappears. The kid is helped by Allida Valli and Richard Basehart (who appears suddenly without any explanation). This thriller with a desperate young boy (touching Richard O'Sullivan) is slow-paced until a fast energic ending. The scenes with the father as a sick prisonner are creepy. There are a lot of views of Venice with lot of crowd, on the contrary of "the Venetian bird" directed the year before in a deserted Venice (also talkie movie with a fast energic ending). Not the best movie directed by Mario Soldati.