A whispering voice over the telephone foretells a murder to occur at a specified time. Another occurs on schedule. The heroine, Doris Stockbridge, is then threatened, but she is saved through the ingenuity of her sweetheart, Barry, who, with the help of Cassidy and McCarthy, two boob detectives, uncovers the diabolical scheming of an ex-convict and his inventor pal, both of whom are seeking revenge. A bloodhound is called in, and the villains are tracked down with alternately thrilling and comic sequences.

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