St. Clancy runs a taut ship out of N.Y.'s 52nd precinct. However, his life gets untidy after the Sing Sing breakout of young Lenny Cervera who had screamed revenge against his girl, the trial judge, the prosecutor and Clancy when they got him sent up. A lesser mind might think that Lenny was behind it all when the trial principles were murdered and threatened in order. But, quick as you can say ""Agatha Christie et al"", Clancy is checking to see who is using the Lenny legend to get at whom. Fast reading, formula escape.